Color

#51403e

#51403e
hex#51403e
rgbrgb(81, 64, 62)
hslhsl(6, 13%, 28%)
oklchoklch(0.389 0.024 26)
Closest name: Black Truffle (#463d3e)Relative luminance 0.0576

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3e4f51

#513e46 · #51493e

#3e5140 · #403e51

Split-complementary

Open in tool →

#3e5149 · #3e4651

#46513e · #3e4f51 · #493e51

Contrast

#51403e as textRatioAAAA largeAAAFix
Aaon white
9.75:1passpasspassPasses AAA — no fix needed.
Aaon black
2.15:1failfailfail
  • AA: use #8a6e6a as the text (4.52:1)
  • AAA: use #a8918f as the text (7.11:1)
  • AA: or shift the background to #b3b3b3 (4.65:1)
  • 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 #51403e 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

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

mcpConnect your agent — build around #51403e
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 #51403e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51403e-c4a59c-62cba3-2d271f-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