Onyx Hollow color palette — #C4EFF9 · #80B6D6 · #5782B1 · #664672 · #45173F

Deep Indigo and Cerulean set the tone — five colors that lean into trust and stability.

The five colors

• Frost (#C4EFF9): A whisper-light, dusty blue — the color of open sky before noon.
• Sky (#80B6D6): A luminous, dusty blue — the color of open sky before noon.
• Cerulean (#5782B1): A full-bodied, balanced blue — the color of open sky before noon.
• Charcoal Brown (#664672): A full-bodied, dusty pink — the color of peonies in June.
• Deep Indigo (#45173F): A deep, shadowed, balanced pink — the color of peonies in June.

Feels like: Trust, Stability, Creativity, Calm, Balance. Tagged vintage, retro, muted, cool.

Use it as a design system

One click turns Onyx Hollow into a complete token system: semantic roles from primary to success, an 11-stop OKLCH scale per role, a WCAG AA/AAA and APCA contrast matrix, an auto-derived dark mode and 11 export formats including CSS custom properties, Tailwind, Figma Variables and shadcn/ui.

Similar palettes

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Browse the whole catalog at Explore, or see today's palette.