palette-mix()

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The palette-mix() CSS function can be used to create a new font-palette value by blending together two font-palette values by specified percentages and color interpolation methods.

Syntax

css
/* Blending font-defined palettes */
font-palette: palette-mix(in lch, normal, dark)

/* Blending author-defined palettes */
font-palette: palette-mix(in lch, --blues, --yellows)

/* Varying percentage of each palette mixed */
font-palette: palette-mix(in lch, --blues 50%, --yellows 50%)
font-palette: palette-mix(in lch, --blues 70%, --yellows 30%)

/* Varying color interpolation method */
font-palette: palette-mix(in srgb, --blues, --yellows)
font-palette: palette-mix(in hsl, --blues, --yellows)
font-palette: palette-mix(in hsl shorter hue, --blues, --yellows)

Values

Functional notation:

palette-mix(method, palette1 [p1], palette2 [p2])
method

A <color-interpolation-method> specifying the interpolation color space.

palette1, palette2

The font-palette values to blend together. These can be any font-palette values, including palette-mix() functions, normal, dark, and light.

p1, p2 Optional

<percentage> values between 0% and 100% specifying the amount of each palette to mix. They are normalized as follows:

  • If both p1 and p2 are omitted, then p1 = p2 = 50%.
  • If p1 is omitted, then p1 = 100% - p2.
  • If p2 is omitted, then p2 = 100% - p1.
  • If p1 = p2 = 0%, the function is invalid.
  • If p1 + p2 ≠ 100%, then p1' = p1 / (p1 + p2) and p2' = p2 / (p1 + p2), where p1' and p2' are the normalization results.

Formal syntax

<palette-mix()> = 
  palette-mix( <color-interpolation-method> , [ [ normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2} )  

<color-interpolation-method> = 
  in [ <rectangular-color-space> | <polar-color-space> <hue-interpolation-method>? ]  

<rectangular-color-space> = 
  srgb          |
  srgb-linear   |
  display-p3    |
  a98-rgb       |
  prophoto-rgb  |
  rec2020       |
  lab           |
  oklab         |
  xyz           |
  xyz-d50       |
  xyz-d65       

<polar-color-space> = 
  hsl    |
  hwb    |
  lch    |
  oklch  

<hue-interpolation-method> = 
  [ shorter | longer | increasing | decreasing ] hue

Examples

Using palette-mix() to blend two palettes

This example shows how to use the palette-mix() function to create a new palette by blending two others.

HTML

The HTML contains three paragraphs to apply our font information to:

html
<p class="yellowPalette">Yellow palette</p>
<p class="bluePalette">Blue palette</p>
<p class="mixedPalette">Mixed palette</p>

CSS

In the CSS, we import a color font from Google Fonts, and define two custom font-palette values using the @font-palette-values at-rule. We then apply three different font-palette values to the paragraphs — --yellow, --blue, and a new green palette, created using palette-mix() to blend the blue and yellow palettes together.

css
@import url("https://fonts.googleapis.com/css2?family=Nabla&display=swap");

@font-palette-values --blueNabla {
  font-family: Nabla;
  base-palette: 2; /* this is Nabla's blue palette */
}

@font-palette-values --yellowNabla {
  font-family: Nabla;
  base-palette: 7; /* this is Nabla's yellow palette */
}

p {
  font-family: "Nabla";
  font-size: 4rem;
  text-align: center;
  margin: 0;
}

.yellowPalette {
  font-palette: --yellowNabla;
}

.bluePalette {
  font-palette: --blueNabla;
}

.mixedPalette {
  font-palette: palette-mix(in lch, --blueNabla 55%, --yellowNabla 45%);
}

Result

The output looks like this:

Specifications

Specification
CSS Fonts Module Level 4
# typedef-font-palette-palette-mix

Browser compatibility

BCD tables only load in the browser

See also