Color tools

Client

Convert CSS colors, build harmony palettes, generate light/dark theme tokens, suggest accessible pairs, check WCAG contrast, or browse web-safe swatches—all in your browser. Choose a card below; scenarios and tips follow the grid.

Browse color tools

Each card is a standalone route—converter and contrast are common starting points; harmony, Tailwind-style theme, MUI palette, and HeroUI-style variables help when you are building design tokens.

Nearby workflows on Toolcore

  • Color converter — when a spec gives HEX but your stack needs rgb(), hsl(), or OKLCH.
  • WCAG contrast — to confirm text/background pairs after picking palette colors.
  • Tailwind-style theme — for primary 50–950 ramps and semantic CSS variables from one accent.
  • Harmony palette — when you need complementary or triadic sets beyond a single swatch.

Common use cases

  • Start in the converter when a design spec gives one syntax (for example HEX) but your codebase or tokens need rgb(), hsl(), or OKLCH.
  • Open the harmony palette when you have one brand color and need complementary, triadic, or monochromatic companions plus a paste-ready :root variable block.
  • Use accessible color suggest when one of the two colors is fixed, then open the WCAG contrast checker to confirm the exact pair for normal or large text.
  • Use web-safe swatches when you reference older guidelines, email HTML, or want a deliberately limited palette with predictable cross-browser names.
  • Open Tailwind-style theme when you have one accent and want primary 50–950 plus semantic light/dark CSS you can paste next to shadcn-style components.
  • Use MUI theme palette when you need copy-paste createTheme() objects for Material UI (primary/secondary ramps, surfaces, divider) from the same brand inputs.
  • Use HeroUI-style theme when you ship HeroUI v3 with Tailwind v4—copy @layer base OKLCH variables that line up with their semantic token names.
  • Chain tools: build a palette, copy HEX into the converter for alternate syntaxes, then paste pairs into the contrast checker without retyping.

Common mistakes to avoid

  • Treating hub tools as interchangeable

    Conversion returns equivalent CSS syntax; contrast checking answers whether two colors are readable together. Use both when you need matching formats and accessible combinations.

  • Expecting contrast results for gradients or images

    The contrast checker is built for solid text and background colors. For photos or multi-stop backgrounds, sample representative flat colors or test in your design tool.

  • Assuming web-safe swatches match modern P3 displays

    The 216 palette is a historical reference. Modern UIs often use wider gamut colors; use web-safe when you intentionally want that constrained set.

FAQ

Do Color tools upload my inputs?

No. These pages run in your browser; we do not receive your colors or files.

Which tool should I open first?

There is no single entry: use the converter for format translation, the harmony palette for multi-color sets and CSS variables, the contrast checker for WCAG ratios, and web-safe colors for the classic 216 palette. The cards list each job.

Is HEX the same as OKLCH for a given color?

They can represent the same appearance, but the syntax differs. OKLCH is a perceptual space that often behaves better for lightness steps; HEX is widely supported everywhere. The converter shows multiple forms so you can copy what your stack needs.

Can assistants link to these tools with prefilled colors?

Yes. See /ai-agents and the machine-readable tool list for URL patterns (for example color strings for the converter and harmony palette, or foreground and background for contrast). Processing still happens in the visitor's browser.

Popular searches in this area

Phrases people search for that match this tool. See the full long-tail keyword index.

  • online color tools hub
  • color converter and palette
  • wcag contrast checker online
  • tailwind color theme generator

More tools

Explore other utilities on Toolcore—useful next steps outside this hub.