Changes to CSS Color Parser

Unreleased (minor)

Add support for analogous set in color interpolations

4.0.2

February 21, 2026

Updated @csstools/css-calc to 3.1.1 (minor)
Updated @csstools/color-helpers to 6.0.2 (patch)

4.0.1

January 25, 2026

Updated @csstools/color-helpers to 6.0.1 (patch)

4.0.0

January 14, 2026

Updated: Support for Node 20.19.0 or later (major).
Removed: commonjs API. In supported Node versions require(esm) will work without needing to make code changes.
Updated @csstools/color-helpers to 6.0.0 (major)
Updated @csstools/css-tokenizer to 4.0.0 (major)
Updated @csstools/css-parser-algorithms to 4.0.0 (major)
Updated @csstools/css-calc to 3.0.0 (major)

3.1.0

August 22, 2025

Add support for display-p3-linear in color(display-p3-linear 0.3081 0.014 0.0567)
Add support for display-p3-linear in color-mix(in display-p3-linear, red, blue)
Add support for omitting the color space in color-mix(red, blue)
Add support for alpha(from red / 0.5)
Updated @csstools/color-helpers to 5.1.0 (minor)

3.0.10

May 27, 2025

Updated @csstools/css-tokenizer to 3.0.4 (patch)
Updated @csstools/css-parser-algorithms to 3.0.5 (patch)
Updated @csstools/css-calc to 2.1.4 (patch)

3.0.9

April 19, 2025

Drop the max keyword for contrast-color( <color> )
Updated @csstools/css-calc to 2.1.3 (patch)

3.0.8

February 23, 2025

Use Number.isNaN instead of NaN for consistency.
Updated @csstools/color-helpers to 5.0.2 (patch)
Updated @csstools/css-calc to 2.1.2 (patch)

3.0.7

December 27, 2024

Fix precision of negative numbers.
Updated @csstools/css-calc to 2.1.1 (patch)

3.0.6

November 11, 2024

Updated @csstools/css-calc to 2.1.0 (minor)

3.0.5

November 1, 2024

Updated @csstools/css-tokenizer to 3.0.3 (patch)
Updated @csstools/css-parser-algorithms to 3.0.4 (patch)
Updated @csstools/css-calc to 2.0.4 (patch)

3.0.4

October 23, 2024

Updated @csstools/css-parser-algorithms to 3.0.3 (patch)
Updated @csstools/css-calc to 2.0.3 (patch)

3.0.3

October 10, 2024

Updated @csstools/css-tokenizer to 3.0.2 (patch)
Updated @csstools/css-parser-algorithms to 3.0.2 (patch)
Updated @csstools/css-calc to 2.0.2 (patch)

3.0.2

August 18, 2024

Updated @csstools/css-tokenizer to 3.0.1 (patch)
Updated @csstools/css-parser-algorithms to 3.0.1 (patch)
Updated @csstools/css-calc to 2.0.1 (patch)

3.0.1

August 14, 2024

Updated @csstools/color-helpers to 5.0.1 (patch)

3.0.0

August 3, 2024

Updated: Support for Node v18+ (major).
Updated @csstools/css-tokenizer to 3.0.0 (major)
Updated @csstools/css-parser-algorithms to 3.0.0 (major)
Updated @csstools/css-calc to 2.0.0 (major)

2.0.5

July 13, 2024

fix serializeP3 when gamutMapping is false

2.0.4

July 6, 2024

Updated @csstools/css-tokenizer to 2.4.1 (patch)
Updated @csstools/css-parser-algorithms to 2.7.1 (patch)
Updated @csstools/css-calc to 1.2.4 (patch)

2.0.3

June 29, 2024

Updated @csstools/color-helpers to 4.2.1 (patch)
Updated @csstools/css-tokenizer to 2.3.2 (patch)
Updated @csstools/css-parser-algorithms to 2.7.0 (minor)
Updated @csstools/css-calc to 1.2.3 (patch)

2.0.2

May 4, 2024

Updated @csstools/css-tokenizer to 2.3.1 (patch)
Updated @csstools/css-parser-algorithms to 2.6.3 (patch)
Updated @csstools/css-calc to 1.2.2 (patch)

2.0.1

May 4, 2024

Improve handling of NaN and Infinity in color functions.
Updated @csstools/css-tokenizer to 2.3.0 (minor)
Updated @csstools/css-parser-algorithms to 2.6.2 (patch)
Updated @csstools/css-calc to 1.2.1 (patch)

2.0.0

April 21, 2024

Switch to the ray-tracing gamut mapping algorithm. This is a minimally invasive change when generating fallback colors for CSS but breaking if you relied on the exact output of the previous gamut mapping algorithm.
Fix none keyword conversion in relative color syntax origin values. (again)
Updated @csstools/color-helpers to 4.2.0 (minor)

1.6.3

March 31, 2024

Fix missing rectangular color spaces for interpolation in color-mix().
Fix none keyword conversion in relative color syntax origin values.
Updated @csstools/color-helpers to 4.1.0 (minor)

1.6.2

March 16, 2024

Fix powerless components for lch and oklch with none chroma.

1.6.1

March 16, 2024

Fix powerless components for hsl with none saturation.

1.6.0

March 13, 2024

Add support for contrast-color( <color> max )
Allow relative color syntax in rgba and hsla color notations.
Updated @csstools/css-tokenizer to 2.2.4 (patch)
Updated @csstools/css-parser-algorithms to 2.6.1 (patch)
Updated @csstools/css-calc to 1.2.0 (minor)

1.5.2

February 19, 2024

Clamp negative saturation to zero in modern hsl
Updated @csstools/css-parser-algorithms to 2.6.0 (minor)
Updated @csstools/css-calc to 1.1.7 (patch)

1.5.1

December 31, 2023

Updated @csstools/css-tokenizer to 2.2.3 (patch)
Updated @csstools/css-parser-algorithms to 2.5.0 (minor)
Updated @csstools/css-calc to 1.1.6 (patch)

1.5.0

December 15, 2023

Add the Experimental syntax flag, to be used in future features.
Add a serializeHSL function.
Fix type definitions
Improve JS Doc comments
Updated @csstools/color-helpers to 4.0.0 (major)
Updated @csstools/css-tokenizer to 2.2.2 (patch)
Updated @csstools/css-parser-algorithms to 2.4.0 (minor)
Updated @csstools/css-calc to 1.1.5 (patch)

1.4.0

October 9, 2023

Add utility to determine if a color is in the Display P3 gamut.

1.3.3

October 2, 2023

Fix interpolation of hue when either or both components are none and longer is the interpolation method.

1.3.2

September 24, 2023

Small performance improvements
Updated @csstools/css-tokenizer to 2.2.1 (patch)
Updated @csstools/css-parser-algorithms to 2.3.2 (patch)
Updated @csstools/css-calc to 1.1.4 (patch)

1.3.1

September 2, 2023

Fix clipping of values in hsl, hwb and rgb color notations.
Updated @csstools/color-helpers to 3.0.2 (patch)

1.3.0

August 28, 2023

Add a serializeOKLCH function.
Always convert to the target color space, even when the input color is already in that specific color space.
Correctly apply the hue interpolation method when either angle is missing.
Updated @csstools/color-helpers to 3.0.1 (patch)

1.2.3

July 24, 2023

Allow number values in hwb.
Fix value calculation for s, l (hsl) and w, b (hwb) components in relative color syntax.
a and b components in lab and oklab are analogous.
Powerless components are limited to achromatic colors and only affect hue unless otherwise specified.
Fix value normalization.
Updated @csstools/css-tokenizer to 2.2.0 (minor)
Updated @csstools/css-parser-algorithms to 2.3.1 (patch)
Updated @csstools/css-calc to 1.1.3 (patch)

1.2.2

July 3, 2023

Updated @csstools/color-helpers to 3.0.0 (major)
Updated @csstools/css-parser-algorithms to 2.3.0 (minor)
Updated @csstools/css-calc to 1.1.2 (patch)

1.2.1

June 14, 2023

Fix value calculation for hue components in relative color syntax.

1.2.0

May 19, 2023

Add support for relative color syntax.
Updated @csstools/color-helpers to 2.1.0 (minor)

1.1.2

April 10, 2023

Updated @csstools/css-tokenizer to 2.1.1 (patch)
Updated @csstools/css-parser-algorithms to 2.1.1 (patch)
Updated @csstools/css-calc to 1.1.1 (patch)

1.1.1