Color

#51455e

#51455e
hex#51455e
rgbrgb(81, 69, 94)
hslhsl(269, 15%, 32%)
oklchoklch(0.413 0.044 306.4)
Closest name: Black Magic (#4f4554)Relative luminance 0.0681

Colors that go with #51455e

Teal, 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#525e45

#45465e · #5d455e

#5e5145 · #455e51

Split-complementary

Open in tool →

#5e5d45 · #465e45

#5e4546 · #525e45 · #455e5d

Contrast

#51455e as textRatioAAAA largeAAAFix
Aaon white
8.89:1passpasspassPasses AAA — no fix needed.
Aaon black
2.36:1failfailfail
  • AA: use #816f95 as the text (4.64:1)
  • AAA: use #9e90ad as the text (7.05:1)
  • AA: or shift the background to #bababa (4.58:1)
  • AAA: or shift the background to #e6e6e6 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51455e as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #51455e
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 #51455e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51455e-b49cc4-cbcb62-2c1f2d-e9e9f1?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