Color / Design / CSS
Free online color / design / css for practical everyday tasks.
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Color Palette Generator
Generate mathematically related color palettes with locking, HEX/RGB/HSL values, contrast checks and exports.
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Contrast Checker
Check actual WCAG contrast ratios between foreground and background colors with quick pass/fail guidance and live previews.
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Typography Scale Generator
Generate a mathematically consistent modular typography scale with live hierarchy previews and CSS variables.
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CSS Unit Converter
Convert CSS units with real reference relationships and explicit typography, percentage, and viewport context.