sass:color

Compatibility:
Dart Sass
since 1.23.0
LibSass
Ruby Sass

Only Dart Sass currently supports loading built-in modules with @use. Users of other implementations must call functions using their global names instead.

color.adjust($color,
  $red: null, $green: null, $blue: null,
  $hue: null, $saturation: null, $lightness: null,
  $alpha: null)
adjust-color(...) //=> color 

Increases or decreases one or more properties of $color by fixed amounts.

Adds the value passed for each keyword argument to the corresponding property of the color, and returns the adjusted color. It’s an error to specify an RGB property ($red, $green, and/or $blue) at the same time as an HSL property ($hue, $saturation, and/or $lightness).

All optional arguments must be numbers. The $red, $green, and $blue arguments must be unitless and between -255 and 255 (inclusive). The $hue argument must have either the unit deg or no unit. The $saturation and $lightness arguments must be between -100% and 100% (inclusive), and may be unitless. The $alpha argument must be unitless and between -1 and 1 (inclusive).

See also:

SCSS Syntax

@debug color.adjust(#6b717f, $red: 15); // #7a717f
@debug color.adjust(#d2e1dd, $red: -10, $blue: 10); // #c8e1e7
@debug color.adjust(#998099, $lightness: -30%, $alpha: -0.4); // rgba(71, 57, 71, 0.6)

Sass Syntax

@debug color.adjust(#6b717f, $red: 15)  // #7a717f
@debug color.adjust(#d2e1dd, $red: -10, $blue: 10)  // #c8e1e7
@debug color.adjust(#998099, $lightness: -30%, $alpha: -0.4)  // rgba(71, 57, 71, 0.6)
adjust-hue($color, $degrees) //=> color 

Increases or decreases $color’s hue.

The $hue must be a number between -360deg and 360deg (inclusive) to add to $color’s hue. It may be unitless.

See also color.adjust(), which can adjust any property of a color.

⚠️ Heads up!

Because adjust-hue() is redundant with adjust(), it’s not included directly in the new module system. Instead of adjust-hue($color, $amount), you can write color.adjust($color, $hue: $amount).

SCSS Syntax

// Hue 222deg becomes 282deg.
@debug adjust-hue(#6b717f, 60deg); // #796b7f

// Hue 164deg becomes 104deg.
@debug adjust-hue(#d2e1dd, -60deg); // #d6e1d2

// Hue 210deg becomes 255deg.
@debug adjust-hue(#036, 45); // #1a0066

Sass Syntax

// Hue 222deg becomes 282deg.
@debug adjust-hue(#6b717f, 60deg)  // #796b7f

// Hue 164deg becomes 104deg.
@debug adjust-hue(#d2e1dd, -60deg)  // #d6e1d2

// Hue 210deg becomes 255deg.
@debug adjust-hue(#036, 45)  // #1a0066
color.alpha($color)
alpha($color)
opacity($color) //=> number 

Returns the alpha channel of $color as a number between 0 and 1.

As a special case, this supports the Internet Explorer syntax alpha(opacity=20), for which it returns an unquoted string.

See also:

SCSS Syntax

@debug color.alpha(#e1d7d2); // 1
@debug color.opacity(rgb(210, 225, 221, 0.4)); // 0.4
@debug alpha(opacity=20); // alpha(opacity=20)

Sass Syntax

@debug color.alpha(#e1d7d2)  // 1
@debug color.opacity(rgb(210, 225, 221, 0.4))  // 0.4
@debug alpha(opacity=20)  // alpha(opacity=20)
color.blue($color)
blue($color) //=> number 

Returns the blue channel of $color as a number between 0 and 255.

See also:

SCSS Syntax

@debug color.blue(#e1d7d2); // 210
@debug color.blue(white); // 255
@debug color.blue(black); // 0

Sass Syntax

@debug color.blue(#e1d7d2)  // 210
@debug color.blue(white)  // 255
@debug color.blue(black)  // 0
color.change($color,
  $red: null, $green: null, $blue: null,
  $hue: null, $saturation: null, $lightness: null,
  $alpha: null)
change-color(...) //=> color 

Sets one or more properties of a color to new values.

Uses the value passed for each keyword argument in place of the corresponding property of the color, and returns the changed color. It’s an error to specify an RGB property ($red, $green, and/or $blue) at the same time as an HSL property ($hue, $saturation, and/or $lightness).

All optional arguments must be numbers. The $red, $green, and $blue arguments must be unitless and between 0 and 255 (inclusive). The $hue argument must have either the unit deg or no unit. The $saturation and $lightness arguments must be between 0% and 100% (inclusive), and may be unitless. The $alpha argument must be unitless and between -1 and 1 (inclusive).

See also:

SCSS Syntax

@debug color.change(#6b717f, $red: 100); // #64717f
@debug color.change(#d2e1dd, $red: 100, $blue: 50); // #64e132
@debug color.change(#998099, $lightness: 30%, $alpha: 0.5); // rgba(85, 68, 85, 0.5)

Sass Syntax

@debug color.change(#6b717f, $red: 100)  // #64717f
@debug color.change(#d2e1dd, $red: 100, $blue: 50)  // #64e132
@debug color.change(#998099, $lightness: 30%, $alpha: 0.5)  // rgba(85, 68, 85, 0.5)
color.complement($color)
complement($color) //=> color 

Returns the RGB complement of $color.

This is identical to color.adjust($color, $hue: 180deg).

SCSS Syntax

// Hue 222deg becomes 42deg.
@debug color.complement(#6b717f); // #7f796b

// Hue 164deg becomes 344deg.
@debug color.complement(#d2e1dd); // #e1d2d6

// Hue 210deg becomes 30deg.
@debug color.complement(#036); // #663300

Sass Syntax

// Hue 222deg becomes 42deg.
@debug color.complement(#6b717f)  // #7f796b

// Hue 164deg becomes 344deg.
@debug color.complement(#d2e1dd)  // #e1d2d6

// Hue 210deg becomes 30deg.
@debug color.complement(#036)  // #663300
darken($color, $amount) //=> color 

Makes $color darker.

The $amount must be a number between 0% and 100% (inclusive). Decreases the HSL lightness of $color by that amount.

⚠️ Heads up!

The darken() function decreases lightness by a fixed amount, which is often not the desired effect. To make a color a certain percentage darker than it was before, use color.scale() instead.

Because darken() is usually not the best way to make a color darker, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, darken($color, $amount) can be written color.adjust($color, $lightness: -$amount).

SCSS Syntax

// #036 has lightness 20%, so when darken() subtracts 30% it just returns black.
@debug darken(#036, 30%); // black

// scale() instead makes it 30% darker than it was originally.
@debug color.scale(#036, $lightness: -30%); // #002447

Sass Syntax

// #036 has lightness 20%, so when darken() subtracts 30% it just returns black.
@debug darken(#036, 30%)  // black

// scale() instead makes it 30% darker than it was originally.
@debug color.scale(#036, $lightness: -30%)  // #002447

SCSS Syntax

// Lightness 92% becomes 72%.
@debug darken(#b37399, 20%); // #7c4465

// Lightness 85% becomes 45%.
@debug darken(#f2ece4, 40%); // #b08b5a

// Lightness 20% becomes 0%.
@debug darken(#036, 30%); // black

Sass Syntax

// Lightness 92% becomes 72%.
@debug darken(#b37399, 20%)  // #7c4465

// Lightness 85% becomes 45%.
@debug darken(#f2ece4, 40%)  // #b08b5a

// Lightness 20% becomes 0%.
@debug darken(#036, 30%)  // black
desaturate($color, $amount) //=> color 

Makes $color less saturated.

The $amount must be a number between 0% and 100% (inclusive). Decreases the HSL saturation of $color by that amount.

⚠️ Heads up!

The desaturate() function decreases saturation by a fixed amount, which is often not the desired effect. To make a color a certain percentage less saturated than it was before, use color.scale() instead.

Because desaturate() is usually not the best way to make a color less saturated, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, desaturate($color, $amount) can be written color.adjust($color, $saturation: -$amount).

SCSS Syntax

// #d2e1dd has saturation 20%, so when desaturate() subtracts 30% it just
// returns gray.
@debug desaturate(#d2e1dd, 30%); // #dadada

// scale() instead makes it 30% less saturated than it was originally.
@debug color.scale(#6b717f, $saturation: -30%); // #6e727c

Sass Syntax

// #6b717f has saturation 20%, so when desaturate() subtracts 30% it just
// returns gray.
@debug desaturate(#d2e1dd, 30%)  // #dadada

// scale() instead makes it 30% less saturated than it was originally.
@debug color.scale(#6b717f, $saturation: -30%)  // #6e727c

SCSS Syntax

// Saturation 100% becomes 80%.
@debug desaturate(#036, 20%); // #0a335c

// Saturation 35% becomes 15%.
@debug desaturate(#f2ece4, 20%); // #eeebe8

// Saturation 20% becomes 0%.
@debug desaturate(#d2e1dd, 30%); // #dadada

Sass Syntax

// Saturation 100% becomes 80%.
@debug desaturate(#036, 20%)  // #0a335c

// Saturation 35% becomes 15%.
@debug desaturate(#f2ece4, 20%)  // #eeebe8

// Saturation 20% becomes 0%.
@debug desaturate(#d2e1dd, 30%)  // #dadada
color.grayscale($color)
grayscale($color) //=> color 

Returns a gray color with the same lightness as $color.

This is identical to color.change($color, $saturation: 0%).

SCSS Syntax

@debug color.grayscale(#6b717f); // #757575
@debug color.grayscale(#d2e1dd); // #dadada
@debug color.grayscale(#036); // #333333

Sass Syntax

@debug color.grayscale(#6b717f)  // #757575
@debug color.grayscale(#d2e1dd)  // #dadada
@debug color.grayscale(#036)  // #333333
color.green($color)
green($color) //=> number 

Returns the green channel of $color as a number between 0 and 255.

See also:

SCSS Syntax

@debug color.green(#e1d7d2); // 215
@debug color.green(white); // 255
@debug color.green(black); // 0

Sass Syntax

@debug color.green(#e1d7d2)  // 215
@debug color.green(white)  // 255
@debug color.green(black)  // 0
color.hue($color)
hue($color) //=> number 

Returns the hue of $color as a number between 0deg and 360deg.

See also:

SCSS Syntax

@debug color.hue(#e1d7d2); // 20deg
@debug color.hue(#f2ece4); // 34.2857142857deg
@debug color.hue(#dadbdf); // 228deg

Sass Syntax

@debug color.hue(#e1d7d2)  // 20deg
@debug color.hue(#f2ece4)  // 34.2857142857deg
@debug color.hue(#dadbdf)  // 228deg
color.ie-hex-str($color)
ie-hex-str($color) //=> unquoted string 

Returns an unquoted string that represents $color in the #AARRGGBB format expected by Internet Explorer’s -ms-filter property.

SCSS Syntax

@debug color.ie-hex-str(#b37399); // #FFB37399
@debug color.ie-hex-str(#808c99); // #FF808C99
@debug color.ie-hex-str(rgba(242, 236, 228, 0.6)); // #99F2ECE4

Sass Syntax

@debug color.ie-hex-str(#b37399); // #FFB37399
@debug color.ie-hex-str(#808c99); // #FF808C99
@debug color.ie-hex-str(rgba(242, 236, 228, 0.6)); // #99F2ECE4
color.invert($color, $weight: 100%)
invert($color, $weight: 100%) //=> color 

Returns the inverse or negative of $color.

The $weight must be a number between 0% and 100% (inclusive). A higher weight means the result will be closer to the negative, and a lower weight means it will be closer to $color. Weight 50% will always produce #808080.

SCSS Syntax

@debug color.invert(#b37399); // #4c8c66
@debug color.invert(black); // white
@debug color.invert(#550e0c, 20%); // #663b3a

Sass Syntax

@debug color.invert(#b37399)  // #4c8c66
@debug color.invert(black)  // white
@debug color.invert(#550e0c, 20%)  // #663b3a
lighten($color, $amount) //=> color 

Makes $color lighter.

The $amount must be a number between 0% and 100% (inclusive). Increases the HSL lightness of $color by that amount.

⚠️ Heads up!

The lighten() function increases lightness by a fixed amount, which is often not the desired effect. To make a color a certain percentage lighter than it was before, use scale() instead.

Because lighten() is usually not the best way to make a color lighter, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, lighten($color, $amount) can be written adjust($color, $lightness: $amount).

SCSS Syntax

// #e1d7d2 has lightness 85%, so when lighten() adds 30% it just returns white.
@debug lighten(#e1d7d2, 30%); // white

// scale() instead makes it 30% lighter than it was originally.
@debug color.scale(#e1d7d2, $lightness: 30%); // #eae3e0

Sass Syntax

// #e1d7d2 has lightness 85%, so when lighten() adds 30% it just returns white.
@debug lighten(#e1d7d2, 30%)  // white

// scale() instead makes it 30% lighter than it was originally.
@debug color.scale(#e1d7d2, $lightness: 30%)  // #eae3e0

SCSS Syntax

// Lightness 46% becomes 66%.
@debug lighten(#6b717f, 20%); // #a1a5af

// Lightness 20% becomes 80%.
@debug lighten(#036, 60%); // #99ccff

// Lightness 85% becomes 100%.
@debug lighten(#e1d7d2, 30%); // white

Sass Syntax

// Lightness 46% becomes 66%.
@debug lighten(#6b717f, 20%)  // #a1a5af

// Lightness 20% becomes 80%.
@debug lighten(#036, 60%)  // #99ccff

// Lightness 85% becomes 100%.
@debug lighten(#e1d7d2, 30%)  // white
color.lightness($color)
lightness($color) //=> number 

Returns the HSL lightness of $color as a number between 0% and 100%.

See also:

SCSS Syntax

@debug color.lightness(#e1d7d2); // 85.2941176471%
@debug color.lightness(#f2ece4); // 92.1568627451%
@debug color.lightness(#dadbdf); // 86.4705882353%

Sass Syntax

@debug color.lightness(#e1d7d2)  // 85.2941176471%
@debug color.lightness(#f2ece4)  // 92.1568627451%
@debug color.lightness(#dadbdf)  // 86.4705882353%
color.mix($color1, $color2, $weight: 50%)
mix($color1, $color2, $weight: 50%) //=> color 

Returns a number that’s a mixture of $color1 and $color2.

Both the $weight and the relative opacity of each color determines how much of each color is in the result. The $weight must be a number between 0% and 100% (inclusive). A larger weight indicates that more of $color1 should be used, and a smaller weight indicates that more of $color2 should be used.

SCSS Syntax

@debug color.mix(#036, #d2e1dd); // #698aa2
@debug color.mix(#036, #d2e1dd, 75%); // #355f84
@debug color.mix(#036, #d2e1dd, 25%); // #9eb6bf
@debug color.mix(rgba(242, 236, 228, 0.5), #6b717f); // rgba(141, 144, 152, 0.75)

Sass Syntax

@debug color.mix(#036, #d2e1dd)  // #698aa2
@debug color.mix(#036, #d2e1dd, 75%)  // #355f84
@debug color.mix(#036, #d2e1dd, 25%)  // #9eb6bf
@debug color.mix(rgba(242, 236, 228, 0.5), #6b717f)  // rgba(141, 144, 152, 0.75)
opacify($color, $amount)
fade-in($color, $amount) //=> color 

Makes $color more opaque.

The $amount must be a number between 0 and 1 (inclusive). Increases the alpha channel of $color by that amount.

⚠️ Heads up!

The opacify() function increases the alpha channel by a fixed amount, which is often not the desired effect. To make a color a certain percentage more opaque than it was before, use scale() instead.

Because opacify() is usually not the best way to make a color more opaque, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, opacify($color, $amount) can be written adjust($color, $alpha: -$amount).

SCSS Syntax

// rgba(#036, 0.7) has alpha 0.7, so when opacify() adds 0.3 it returns a fully
// opaque color.
@debug opacify(rgba(#036, 0.7), 0.3); // #036

// scale() instead makes it 30% more opaque than it was originally.
@debug color.scale(rgba(#036, 0.7), $alpha: 30%); // rgba(0, 51, 102, 0.79)

Sass Syntax

// rgba(#036, 0.7) has alpha 0.7, so when opacify() adds 0.3 it returns a fully
// opaque color.
@debug opacify(rgba(#036, 0.7), 0.3)  // #036

// scale() instead makes it 30% more opaque than it was originally.
@debug color.scale(rgba(#036, 0.7), $alpha: 30%)  // rgba(0, 51, 102, 0.79)

SCSS Syntax

@debug opacify(rgba(#6b717f, 0.5), 0.2); // rgba(107, 113, 127, 0.7)
@debug fade-in(rgba(#e1d7d2, 0.5), 0.4); // rgba(225, 215, 210, 0.9)
@debug opacify(rgba(#036, 0.7), 0.3); // #036

Sass Syntax

@debug opacify(rgba(#6b717f, 0.5), 0.2)  // rgba(107, 113, 127, 0.7)
@debug fade-in(rgba(#e1d7d2, 0.5), 0.4)  // rgba(225, 215, 210, 0.9)
@debug opacify(rgba(#036, 0.7), 0.3)  // #036
color.red($color)
red($color) //=> number 

Returns the red channel of $color as a number between 0 and 255.

See also:

SCSS Syntax

@debug color.red(#e1d7d2); // 225
@debug color.red(white); // 255
@debug color.red(black); // 0

Sass Syntax

@debug color.red(#e1d7d2)  // 225
@debug color.red(white)  // 255
@debug color.red(black)  // 0
saturate($color, $amount)
saturate($color, $amount) //=> color 

Makes $color more saturated.

The $amount must be a number between 0% and 100% (inclusive). Increases the HSL saturation of $color by that amount.

⚠️ Heads up!

The saturate() function increases saturation by a fixed amount, which is often not the desired effect. To make a color a certain percentage more saturated than it was before, use scale() instead.

Because saturate() is usually not the best way to make a color more saturated, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, saturate($color, $amount) can be written adjust($color, $saturation: $amount).

SCSS Syntax

// #0e4982 has saturation 80%, so when saturate() adds 30% it just becomes
// fully saturated.
@debug saturate(#0e4982, 30%); // #004990

// scale() instead makes it 30% more saturated than it was originally.
@debug color.scale(#0e4982, $saturation: 30%); // #0a4986

Sass Syntax

// #0e4982 has saturation 80%, so when saturate() adds 30% it just becomes
// fully saturated.
@debug saturate(#0e4982, 30%)  // #004990

// scale() instead makes it 30% more saturated than it was originally.
@debug color.scale(#0e4982, $saturation: 30%)  // #0a4986

SCSS Syntax

// Saturation 50% becomes 70%.
@debug saturate(#c69, 20%); // #e05299

// Saturation 35% becomes 85%.
@debug desaturate(#f2ece4, 50%); // #ebebeb

// Saturation 80% becomes 100%.
@debug saturate(#0e4982, 30%)  // #004990

Sass Syntax

// Saturation 50% becomes 70%.
@debug saturate(#c69, 20%); // #e05299

// Saturation 35% becomes 85%.
@debug desaturate(#f2ece4, 50%); // #ebebeb

// Saturation 80% becomes 100%.
@debug saturate(#0e4982, 30%)  // #004990
color.saturation($color)
saturation($color) //=> number 

Returns the HSL saturation of $color as a number between 0% and 100%.

See also:

SCSS Syntax

@debug color.saturation(#e1d7d2); // 20%
@debug color.saturation(#f2ece4); // 30%
@debug color.saturation(#dadbdf); // 7.2463768116%

Sass Syntax

@debug color.saturation(#e1d7d2)  // 20%
@debug color.saturation(#f2ece4)  // 30%
@debug color.saturation(#dadbdf)  // 7.2463768116%
color.scale($color,
  $red: null, $green: null, $blue: null,
  $saturation: null, $lightness: null,
  $alpha: null)
scale-color(...) //=> color 

Fluidly scales one or more properties of $color.

Each keyword argument must be a number between -100% and 100% (inclusive). This indicates how far the corresponding property should be moved from its original position towards the maximum (if the argument is positive) or the minimum (if the argument is negative). This means that, for example, $lightness: 50% will make all colors 50% closer to maximum lightness without making them fully white.

It’s an error to specify an RGB property ($red, $green, and/or $blue) at the same time as an HSL property ($saturation, and/or $lightness).

See also:

SCSS Syntax

@debug color.scale(#6b717f, $red: 15%); // #81717f
@debug color.scale(#d2e1dd, $lightness: -10%, $saturation: 10%); // #b3d4cb
@debug color.scale(#998099, $alpha: -40%); // rgba(153, 128, 153, 0.6)

Sass Syntax

@debug color.scale(#6b717f, $red: 15%)  // #81717f
@debug color.scale(#d2e1dd, $lightness: -10%, $saturation: 10%)  // #b3d4cb
@debug color.scale(#998099, $alpha: -40%)  // rgba(153, 128, 153, 0.6)
transparentize($color, $amount)
fade-out($color, $amount) //=> color 

Makes $color more transparent.

The $amount must be a number between 0 and 1 (inclusive). Decreases the alpha channel of $color by that amount.

⚠️ Heads up!

The transparentize() function decreases the alpha channel by a fixed amount, which is often not the desired effect. To make a color a certain percentage more transparent than it was before, use color.scale() instead.

Because transparentize() is usually not the best way to make a color more transparent, it’s not included directly in the new module system. However, if you have to preserve the existing behavior, transparentize($color, $amount) can be written color.adjust($color, $alpha: -$amount).

SCSS Syntax

// rgba(#036, 0.3) has alpha 0.3, so when transparentize() subtracts 0.3 it
// returns a fully transparent color.
@debug transparentize(rgba(#036, 0.3), 0.3); // rgba(0, 51, 102, 0)

// scale() instead makes it 30% more transparent than it was originally.
@debug color.scale(rgba(#036, 0.3), $alpha: -30%); // rgba(0, 51, 102, 0.21)

Sass Syntax

// rgba(#036, 0.3) has alpha 0.3, so when transparentize() subtracts 0.3 it
// returns a fully transparent color.
@debug transparentize(rgba(#036, 0.3), 0.3)  // rgba(0, 51, 102, 0)

// scale() instead makes it 30% more transparent than it was originally.
@debug color.scale(rgba(#036, 0.3), $alpha: -30%)  // rgba(0, 51, 102, 0.21)

SCSS Syntax

@debug transparentize(rgba(#6b717f, 0.5), 0.2)  // rgba(107, 113, 127, 0.3)
@debug fade-out(rgba(#e1d7d2, 0.5), 0.4)  // rgba(225, 215, 210, 0.1)
@debug transparentize(rgba(#036, 0.3), 0.3)  // rgba(0, 51, 102, 0)

Sass Syntax

@debug transparentize(rgba(#6b717f, 0.5), 0.2)  // rgba(107, 113, 127, 0.3)
@debug fade-out(rgba(#e1d7d2, 0.5), 0.4)  // rgba(225, 215, 210, 0.1)
@debug transparentize(rgba(#036, 0.3), 0.3)  // rgba(0, 51, 102, 0)