Alpine
Open in tool →Glacier blue with a safety-orange accent: technical outdoor gear, not lifestyle.
Color
#21202c
#21202c
hex
#21202crgb
rgb(33, 32, 44)hsl
hsl(245, 16%, 15%)oklch
oklch(0.25 0.023 288.5)Closest name: Eclipse Elixir (#1f2133)Relative luminance 0.0154
Colors that go with #21202c
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 #36454f
neutralshippedCharcoal is the text near-black that reads cleanly against #21202c without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #21202c in 15 real palettes, including Wikipedia's brand system and Beach Hut, as the accent.
Blue #0000ff
shipped23 real palettes, including Bumble's brand system and Monzo's brand system put Blue beside #21202c, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #21202c in 10 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
Blush Pink #e8b4b8
shipped6 real palettes, including Graphite Mono and Blush put Blush Pink beside #21202c, as the accent.
Brown #a52a2a
shipped5 real palettes, including Woodsmoke and Typewriter put Brown beside #21202c, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #21202c in 6 real palettes, including Kiln and Coastal, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #21202c: 10 real palettes, including Dusk and Alpine, as the supporting colour.
Real palettes that use #21202c
Tints & shades
Harmonies
Contrast
| #21202c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.06:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.31:1 | 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 #21202c as the background.
Brands using this color
Palettes built around it
Dusk
Open in tool →Slate blue with a copper accent — calm, professional, slightly editorial; suits consultancies and journals.
Pastel Pop
Open in tool →Pastels pushed to the saturated end — pink, sky and lemon — for brands that want soft AND loud.
Tide Pool
Open in tool →Sea-green and slate with a coral — a literal tide pool: two cool tones, one warm creature.
Fonts for this mood
#21202c reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #21202c
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #21202c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/21202c-a49cc4-dfa54e-261f2d-e9ecf1?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