Color

#51393b

#51393b
hex#51393b
rgbrgb(81, 57, 59)
hslhsl(355, 17%, 27%)
oklchoklch(0.372 0.034 13.3)
Closest name: Black Truffle (#463d3e)Relative luminance 0.0499

Colors that go with #51393b

Sea Green, Steel Blue and Teal 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.

Real palettes that use #51393b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#39514f

#513947 · #514339

#3b5139 · #393b51

Split-complementary

Open in tool →

#395143 · #394751

#475139 · #39514f · #433951

Contrast

#51393b as textRatioAAAA largeAAAFix
Aaon white
10.51:1passpasspassPasses AAA — no fix needed.
Aaon black
2:1failfailfail
  • AA: use #956a6d as the text (4.56:1)
  • AAA: use #af8e90 as the text (7.09:1)
  • AA: or shift the background to #ababab (4.58:1)
  • AAA: or shift the background to #d4d4d4 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51393b 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

#51393b reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51393b
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 #51393b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51393b-c49e9c-62cb8f-2d241f-f1e9ee?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