Color

#51574c

#51574c
hex#51574c
rgbrgb(81, 87, 76)
hslhsl(93, 7%, 32%)
oklchoklch(0.448 0.019 130.7)
Closest name: All Nighter (#455454)Relative luminance 0.0909

Colors that go with #51574c

Blue, Blush Pink and Cadet Blue 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 #51574c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#524c57

#57574c · #4c574c

#4c5157 · #574c51

Split-complementary

Open in tool →

#4c4c57 · #574c57

#4c5757 · #524c57 · #574c4c

Contrast

#51574c as textRatioAAAA largeAAAFix
Aaon white
7.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #6f7868 as the text (4.56:1)
  • AAA: use #91998a as the text (7.13:1)
  • AA: or shift the background to #c9c9c9 (4.5:1)
  • AAA: or shift the background to #fafafa (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 #51574c 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

#51574c reads as neutral, minimal. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51574c
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 #51574c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51574c-a2beb0-c859d4-1f2d2b-eaf1e9?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