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CSSColorsDesignFunctions

CSS Color Functions Guide

Master modern CSS color functions. From color-mix to relative colors to color spaces.

B
Bootspring Team
Engineering
January 16, 2021
7 min read

Modern CSS provides powerful color manipulation functions. Here's how to use them.

color-mix()#

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Relative Color Syntax#

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OKLCH Color Space#

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color() Function#

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LAB and LCH#

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HWB Colors#

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Creating Color Scales#

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Color Contrast#

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Gradients with Color Spaces#

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Dynamic Theming#

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Button Variations#

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Best Practices#

Color Spaces: ✓ Use OKLCH for perceptual uniformity ✓ Use color-mix for simple blending ✓ Use relative colors for modifications ✓ Test in different color spaces Accessibility: ✓ Maintain WCAG contrast ratios ✓ Test with color blindness simulators ✓ Don't rely on color alone ✓ Use sufficient lightness differences Performance: ✓ Prefer CSS over JavaScript ✓ Use CSS custom properties ✓ Minimize calculations ✓ Test browser support Fallbacks: ✓ Provide sRGB fallbacks ✓ Use @supports queries ✓ Test in older browsers ✓ Consider progressive enhancement

Conclusion#

Modern CSS color functions enable powerful color manipulation directly in stylesheets. Use OKLCH for perceptual uniformity, color-mix for blending, and relative color syntax for modifications. Always provide fallbacks for older browsers.

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