Color

#515b3e

#515b3e
hex#515b3e
rgbrgb(81, 91, 62)
hslhsl(81, 19%, 30%)
oklchoklch(0.454 0.047 123.7)
Closest name: Muddy Olive (#4b5d46)Relative luminance 0.0958

Colors that go with #515b3e

Slate Blue, Champagne and Copper lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #515b3e

Tints & shades

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

Harmonies

Complementary

Open in tool →

#483e5b

#5b573e · #425b3e

#3e515b · #5b3e51

Split-complementary

Open in tool →

#3e425b · #573e5b

#3e5b57 · #483e5b · #5b3e42

Contrast

#515b3e as textRatioAAAA largeAAAFix
Aaon white
7.2:1passpasspassPasses AAA — no fix needed.
Aaon black
2.92:1failfailfail
  • AA: use #6f7c55 as the text (4.69:1)
  • AAA: use #8c9c6d as the text (7.09:1)
  • AA: or shift the background to #cfcfcf (4.62:1)
  • AAA: or shift the background to #fcfcfc (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #515b3e 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

#515b3e reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #515b3e
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #515b3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/515b3e-b1bea2-4e62df-222d1f-f1f0e9?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