Color

#51546c

#51546c
hex#51546c
rgbrgb(81, 84, 108)
hslhsl(233, 14%, 37%)
oklchoklch(0.453 0.039 279.1)
Closest name: Freefall (#565266)Relative luminance 0.0917

Colors that go with #51546c

Steel Blue, Teal and 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 #51546c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6c6851

#51616c · #5b516c

#6c5154 · #546c51

Split-complementary

Open in tool →

#6c5b51 · #616c51

#6c5161 · #6c6851 · #516c5b

Contrast

#51546c as textRatioAAAA largeAAAFix
Aaon white
7.41:1passpasspassPasses AAA — no fix needed.
Aaon black
2.83:1failfailfail
  • AA: use #717594 as the text (4.67:1)
  • AAA: use #9194ac as the text (7.04:1)
  • AA: or shift the background to #cccccc (4.61:1)
  • AAA: or shift the background to #fafafa (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51546c as the background.

Brands using this color

mcpConnect your agent — build around #51546c
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 #51546c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/51546c-9c9cc4-df884e-241f2d-e9eef1?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