Color

#511a0b

#511a0b
hex#511a0b
rgbrgb(81, 26, 11)
hslhsl(13, 76%, 18%)
oklchoklch(0.302 0.086 35.9)
Closest name: Chocolate Rush (#4e1b0b)Relative luminance 0.0251

Colors that go with #511a0b

Charcoal, Crimson and Royal 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 →

#0b4251

#510b1f · #513d0b

#0b511a · #1a0b51

Split-complementary

Open in tool →

#0b513d · #0b1f51

#1f510b · #0b4251 · #3d0b51

Contrast

#511a0b as textRatioAAAA largeAAAFix
Aaon white
13.98:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #d3441d as the text (4.61:1)
  • AAA: use #e87454 as the text (7.06:1)
  • AA: or shift the background to #949494 (4.61:1)
  • AAA: or shift the background to #b8b8b8 (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 #511a0b as the background.

Brands using this color

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

Fonts for this mood

#511a0b reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #511a0b
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 #511a0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/511a0b-c4a99c-62cbaf-2d281f-f1e9eb?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