Color

#513d3d

#513d3d
hex#513d3d
rgbrgb(81, 61, 61)
hslhsl(0, 14%, 28%)
oklchoklch(0.382 0.028 18.5)
Closest name: Black Truffle (#463d3e)Relative luminance 0.0542

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3d5151

#513d47 · #51473d

#3d513d · #3d3d51

Split-complementary

Open in tool →

#3d5147 · #3d4751

#47513d · #3d5151 · #473d51

Contrast

#513d3d as textRatioAAAA largeAAAFix
Aaon white
10.07:1passpasspassPasses AAA — no fix needed.
Aaon black
2.08:1failfailfail
  • AA: use #916e6e as the text (4.66:1)
  • AAA: use #ac9191 as the text (7.21:1)
  • AA: or shift the background to #b0b0b0 (4.64:1)
  • AAA: or shift the background to #d9d9d9 (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #513d3d 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

#513d3d reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #513d3d
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 #513d3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/513d3d-c4a19c-62cb98-2d251f-f1e9ed?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