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Free Color Harmonizer Online — Live Complementary, Triadic & Analogous

Pick a base color below—explore complementary, triadic, and analogous HEX swatches with a copy-ready list and CSS variables. No upload, no signup, no watermark.

Color harmonizer — live palette from one base color

From one base swatch, explore complementary, triadic, and analogous sets—every harmony recalculates instantly so you can compare directions fast.

1 Pick a base color · 2 Tap samples if you want a jump start · 3 Review swatches & list · 4 Copy list or CSS vars

Your harmony palette

Try #3366CC or shorthand #36C; swatches update when the value is valid. Click any swatch to copy one HEX. Need WCAG ratios? Use the contrast checker.

Runs in this tab only—no server upload, no signup, no watermark.

Set a base HEX—harmony swatches and CSS variables update below.

Next: WCAG contrast · Gradient · Palette · All design tools · All tools

  • Works in your browser—runs on your device, not our servers
  • No upload required—your input stays in this tab
  • Free and instant
  • No account needed
  • Private by default—the same ProToolbox promise on every page

What this is for

Free Color Harmonizer Online — Live Complementary, Triadic & Analogous supports accessible color work: works in your browser, free and instant. Contrast, hex/RGB, palettes, gradients—check before handoff or component merges.

  • Re-check after token or theme updates
  • Capture values for docs and CSS variables
  • Iterate next to your design file
  • Document AA vs AAA when asked

Together: This supplements Figma or Penpot—not a replacement for design judgment.

Bookmark this page for brand palettes, UI states, and slide decks—you will reach for harmony checks on every project.

Color harmonizer — overview

Use this when you need a cohesive set of hues from one brand or UI anchor. Complementary gives maximum contrast on the wheel; triadic spreads three accents evenly; analogous stays gentle for hover and secondary states. Because saturation and lightness match your base, the set feels intentional—not random rainbow.

How it works

  1. Set your base with the picker or HEX field (try a quick base for inspiration).
  2. Review the six swatches and the labeled list in the result panel.
  3. Tap Copy list & CSS vars for HEX lines plus --harm-* variables—paste into stylesheets or handoff docs.
  4. Iterate—nudge the base until the harmony matches your brand or accessibility goals; then validate contrast separately.

Privacy: Harmony math runs entirely in your browser. We do not upload your colors or store your palette.

FAQ

  • Does this match Figma or Photoshop exactly? The hue relationships align with standard HSL-style wheels; always spot-check in your final tool and on real displays.
  • Do I need an account? No—free, no registration.
  • Is my palette uploaded? No. Everything stays in this tab until you copy it.
  • Mobile friendly? Yes—picker, HEX field, and swatches scale for phones and tablets.
  • Can I use the HEX codes in production? Yes—paste into stylesheets, tokens, or design files.

Save this page—fast harmony checks beat hunting through heavy design apps mid-flow.

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