Color

#508591

#508591
hex#508591
rgbrgb(80, 133, 145)
hslhsl(191, 29%, 44%)
oklchoklch(0.584 0.059 213.8)
Closest name: Arctic (#648589)Relative luminance 0.2052

Colors that go with #508591

Charcoal, Copper 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#915c50

#50917c · #506491

#915085 · #859150

Split-complementary

Open in tool →

#915064 · #917c50

#7c5091 · #915c50 · #649150

Contrast

#508591 as textRatioAAAA largeAAAFix
Aaon white
4.11:1failpassfail
  • AA: use #4a7c87 as the text (4.64:1)
  • AAA: use #385e66 as the text (7.09:1)
  • AA: or shift the background to #121212 (4.55:1)
Aaon black
5.1:1passpassfail
  • AAA: use #689fac as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #508591 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 #508591
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 #508591 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/508591-a2b6be-df4e7a-1f252d-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