Color

#51545d

#51545d
hex#51545d
rgbrgb(81, 84, 93)
hslhsl(225, 7%, 34%)
oklchoklch(0.446 0.015 271.1)
Closest name: Black Orchid (#525463)Relative luminance 0.0888

Colors that go with #51545d

Blue, Cadet Blue and Champagne 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 #51545d

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5d5a51

#515a5d · #54515d

#5d5154 · #545d51

Split-complementary

Open in tool →

#5d5451 · #5a5d51

#5d515a · #5d5a51 · #515d54

Contrast

#51545d as textRatioAAAA largeAAAFix
Aaon white
7.56:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #727683 as the text (4.63:1)
  • AAA: use #9295a0 as the text (7.03:1)
  • AA: or shift the background to #c9c9c9 (4.57:1)
  • AAA: or shift the background to #f7f7f7 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51545d 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

#51545d reads as neutral, minimal. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #51545d
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 #51545d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51545d-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