Dusk
Open in tool →Slate blue with a copper accent — calm, professional, slightly editorial; suits consultancies and journals.
Color
#21272crgb(33, 39, 44)hsl(207, 14%, 15%)oklch(0.269 0.013 243.3)Charcoal, Amber and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal is the text near-black that reads cleanly against #21272c without the hard edge of pure #000.
Amber is paired with #21272c in 18 real palettes, including McDonald's's brand system and Beach Hut, as the lead colour.
23 real palettes, including Readymag's brand system and Rolex's brand system put Blue beside #21272c, as the supporting colour.
Blue Violet is paired with #21272c in 9 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
7 real palettes, including Graphite Mono and Rain Garden put Blush Pink beside #21272c, as the accent.
5 real palettes, including Typewriter and Woodsmoke put Brown beside #21272c, as the accent.
Burlywood is paired with #21272c in 6 real palettes, including Chalkboard and Kiln, as the lead colour.
Designers have shipped Cadet Blue with #21272c: 10 real palettes, including Dusk and Paper & Pine, as the supporting colour.
| #21272c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.09:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.39:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21272c as the background.
#21272c reads as cool, muted, dark. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #21272c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21272c-9cadc4-df4e53-1f212d-e9f1f1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md