Color

#515561

#515561
hex#515561
rgbrgb(81, 85, 97)
hslhsl(225, 9%, 35%)
oklchoklch(0.45 0.02 270.9)
Closest name: Black Orchid (#525463)Relative luminance 0.0911

Colors that go with #515561

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 #515561

Tints & shades

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

Harmonies

Complementary

Open in tool →

#615d51

#515d61 · #555161

#615155 · #556151

Split-complementary

Open in tool →

#615551 · #5d6151

#61515d · #615d51 · #516155

Contrast

#515561 as textRatioAAAA largeAAAFix
Aaon white
7.44:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #6f7585 as the text (4.56:1)
  • AAA: use #9397a5 as the text (7.21:1)
  • AA: or shift the background to #cccccc (4.63:1)
  • AAA: or shift the background to #fafafa (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #515561 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

#515561 reads as muted, minimal. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #515561
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 #515561 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/515561-9ca1c4-df754e-221f2d-e9eff1?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