Color

#51403d

#51403d
hex#51403d
rgbrgb(81, 64, 61)
hslhsl(9, 14%, 28%)
oklchoklch(0.389 0.024 29.8)
Closest name: Black Truffle (#463d3e)Relative luminance 0.0575

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3d4e51

#513d44 · #514a3d

#3d5140 · #403d51

Split-complementary

Open in tool →

#3d514a · #3d4451

#44513d · #3d4e51 · #4a3d51

Contrast

#51403d as textRatioAAAA largeAAAFix
Aaon white
9.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.15:1failfailfail
  • AA: use #8c6e69 as the text (4.55:1)
  • AAA: use #a9928e as the text (7.19:1)
  • AA: or shift the background to #b0b0b0 (4.5:1)
  • AAA: or shift the background to #dbdbdb (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 #51403d 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

#51403d reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51403d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #51403d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51403d-c4a79c-62cba8-2d271f-f1e9ec?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