Test Dark Mode Color Palettes

Light text on dark backgrounds can still fail contrast — check your dark mode palette pairings here.

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Text color

Background color

Large heading text

Medium body text (18px) for reading and content.

Normal body text (16px) for paragraphs.

Small body text (14px) for captions and metadata.

14.63:1

Contrast ratio

✓WCAG AA — Normal text

Requires 4.5:1 · You have 14.63:1

✓WCAG AA — Large text

Requires 3.0:1 · You have 14.63:1

✓WCAG AAA — Normal text

Requires 7.0:1 · You have 14.63:1

✓WCAG AAA — Large text

Requires 4.5:1 · You have 14.63:1

✓UI components / graphical objects

Requires 3.0:1 · You have 14.63:1

Quick presets

Based on WCAG 2.1 contrast guidelines. Large text = 18pt (24px) normal or 14pt (18.66px) bold. Hex codes update in both directions: type a hex or pick a color, both inputs stay in sync.

Dark Mode tips

🌙

Pure white (#ffffff) on pure black (#000000) gives 21:1 — too harsh. Slate-200 (#e2e8f0) on slate-900 (#0f172a) gives 13.1:1, easier on the eyes and still AAA compliant.

💡

Common dark mode mistake: gray-on-gray. Light gray text on dark gray background looks "stylish" but often fails AA (try #94a3b8 on #1e293b — only 4.1:1).

🎯

Accent colors that work on light backgrounds often fail on dark. Test brand accents against your dark surface color before shipping.