Color

#51281f

#51281f
hex#51281f
rgbrgb(81, 40, 31)
hslhsl(11, 45%, 22%)
oklchoklch(0.33 0.064 33.5)
Closest name: Bitter Chocolate (#4f2923)Relative luminance 0.0337

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1f4851

#511f2f · #51411f

#1f5128 · #281f51

Split-complementary

Open in tool →

#1f5141 · #1f2f51

#2f511f · #1f4851 · #411f51

Contrast

#51281f as textRatioAAAA largeAAAFix
Aaon white
12.55:1passpasspassPasses AAA — no fix needed.
Aaon black
1.67:1failfailfail
  • AA: use #b95b46 as the text (4.65:1)
  • AAA: use #cb8676 as the text (7.21:1)
  • AA: or shift the background to #9c9c9c (4.57:1)
  • AAA: or shift the background to #c2c2c2 (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 #51281f 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

#51281f reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51281f
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 #51281f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51281f-c4a89c-62cbab-2d281f-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