Cerulean Study color palette — #D0EFF9 · #009CB3 · #00749F · #003C38 · #000203

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

The five colors

• Frost (#D0EFF9): A whisper-light, dusty blue — the color of open sky before noon.
• Cerulean (#009CB3): A luminous, balanced blue — the color of a favorite pair of jeans.
• Slate (#00749F): A full-bodied, balanced blue — the color of deep harbor water.
• Deep Forest (#003C38): A deep, shadowed, dusty teal — the color of sea glass.
• Black (#000203): quiet, heavy and certain.

Feels like: Trust, Stability, Calm, Sophistication. Tagged pastel, light, muted, cool.

Use it as a design system

One click turns Cerulean Study 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

• Cobalt Studio color palette (#DFF4DC, #4AA2BB, #0A75B8, #00382A, #001518)
• Cobalt Corridor color palette (#D7E5F1, #5585CD, #535CA5, #00364D, #00030E)
• Aged Lagoon color palette (#DBEDE0, #00A076, #00736B, #0A3A01, #000201)
• Cornflower Alley color palette (#BFEAE0, #31CFFE, #5C88E4, #004F29, #000102)
• Gentle Lagoon color palette (#D8E6F3, #77AAFA, #7281CB, #004B69, #001027)
• Periwinkle Hollow color palette (#D4EFFF, #7ED1FF, #75A9ED, #006D7A, #001A2A)
• Faded Iris Field color palette (#D1F1F6, #66A9C2, #8977D1, #345C00, #000F11)
• Inked Terrace color palette (#D7E2EE, #0059A0, #270078, #001F3E, #00000B)

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