Color

#0d211d

#0d211d
hex#0d211d
rgbrgb(13, 33, 29)
hslhsl(168, 43%, 9%)
oklchoklch(0.229 0.027 179.2)
Closest name: Nightmare (#112211)Relative luminance 0.0126

Colors that go with #0d211d

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.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#210d11

#0d2113 · #0d1b21

#1d0d21 · #211d0d

Split-complementary

Open in tool →

#210d1b · #21130d

#130d21 · #210d11 · #1b210d

Contrast

#0d211d as textRatioAAAA largeAAAFix
Aaon white
16.77:1passpasspassPasses AAA — no fix needed.
Aaon black
1.25:1failfailfail
  • AA: use #348373 as the text (4.64:1)
  • AAA: use #43a894 as the text (7.27:1)
  • AA: or shift the background to #858585 (4.54:1)
  • AAA: or shift the background to #a8a8a8 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d211d as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#0d211d reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d211d
live endpoint

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.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0d211d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d211d-a2bebc-d459ad-1f2a2d-e9f1ec?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md