Color

#557c8b

#557c8b
hex#557c8b
rgbrgb(85, 124, 139)
hslhsl(197, 24%, 44%)
oklchoklch(0.563 0.049 224)
Closest name: Beach View (#4f7694)Relative luminance 0.1821

Colors that go with #557c8b

Charcoal, Sienna and Amber 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 #557c8b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8b6555

#558b7f · #55618b

#8b557c · #7c8b55

Split-complementary

Open in tool →

#8b5561 · #8b7f55

#7f558b · #8b6555 · #618b55

Contrast

#557c8b as textRatioAAAA largeAAAFix
Aaon white
4.52:1passpassfail
  • AAA: use #405d68 as the text (7.04:1)
Aaon black
4.64:1passpassfail
  • AAA: use #779dac as the text (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #557c8b 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 #557c8b
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 #557c8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/557c8b-9cb4c4-df4e6b-1f232d-e9f1ef?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