Color

#587e7b

#587e7b
hex#587e7b
rgbrgb(88, 126, 123)
hslhsl(175, 18%, 42%)
oklchoklch(0.564 0.043 189.9)
Closest name: Ecological (#677f70)Relative luminance 0.1843

Colors that go with #587e7b

Charcoal, Champagne and Cobalt 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 #587e7b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7e585b

#587e68 · #586e7e

#7b587e · #7e7b58

Split-complementary

Open in tool →

#7e586e · #7e6858

#68587e · #7e585b · #6e7e58

Contrast

#587e7b as textRatioAAAA largeAAAFix
Aaon white
4.48:1failpassfail
  • AA: use #567b78 as the text (4.67:1)
  • AAA: use #415d5b as the text (7.14:1)
  • AA: or shift the background to #050505 (4.55:1)
Aaon black
4.69:1passpassfail
  • AAA: use #759f9b as the text (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #587e7b 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 #587e7b
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 #587e7b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/587e7b-a2bdbe-d4599f-1f282d-e9f1ed?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