OKLCH Color Specification / Strict WCAG 2.1 AAA / 18 Official Ports

Circadia

Perceptually uniform, low-strain themes engineered for continuous focus.

Built with circadian optical science in OKLCH with strict WCAG 2.1 AAA contrast. Glare-free daylight contrast (Warm Parchment) and halation-free evening warmth (Warm Ember & Obsidian) for 18+ code editors, terminals, and document tools.

Explore:

git clone https://github.com/tanmaymanojgandhi/circadia.git 📋

Warm Parchment

11.30:1 AAA

Daylight Ambient • 300–800+ lux

Warm paper undertones engineered to eliminate retinal glare under bright ambient light.

Click to activate Light mode ✓ Active

Warm Ember & Obsidian

14.36:1 AAA

Evening Ambient • 0–50 lux

Deep obsidian canvas with warm amber accents that minimize blue-light disruption.

Click to activate Dark mode ✓ Active

Tokens & Color Palette

Click any token cell to copy its value.

Syntax Highlight Preview

Perceptually balanced syntax weight across languages.

spec.md

Markdown

Hover a syntax symbol to inspect its token mapping

WCAG 2.1 Accessibility Ratios

Relative luminance verified against canvas background (bg_canvas).

Token	Category	Sample	Hex / OKLCH	Contrast Ratio	WCAG Invariant

Ports & Ecosystem

18 unified themes for editors, terminals, and tools.

Specification Files

Canonical palette data, normative rules, and token mapping docs.

spec/palette.json Canonical OKLCH and Hex palette definitions

spec/rules.md Normative palette and accessibility invariants

spec/token-map.md Semantic mapping guide for port creators