Color

#51311f

#51311f
hex#51311f
rgbrgb(81, 49, 31)
hslhsl(22, 45%, 22%)
oklchoklch(0.348 0.055 49.6)
Closest name: Bitter Chocolate (#4f2923)Relative luminance 0.0404

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1f3f51

#511f26 · #514b1f

#1f5131 · #311f51

Split-complementary

Open in tool →

#1f514b · #1f2651

#26511f · #1f3f51 · #4b1f51

Contrast

#51311f as textRatioAAAA largeAAAFix
Aaon white
11.61:1passpasspassPasses AAA — no fix needed.
Aaon black
1.81:1failfailfail
  • AA: use #a6653f as the text (4.55:1)
  • AAA: use #c58a67 as the text (7.21:1)
  • AA: or shift the background to #a3a3a3 (4.6:1)
  • AAA: or shift the background to #c9c9c9 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51311f 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

#51311f reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51311f
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 #51311f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51311f-c4af9c-62cbbf-2d2a1f-f1e9ea?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