Color

#5b989f

#5b989f
hex#5b989f
rgbrgb(91, 152, 159)
hslhsl(186, 27%, 49%)
oklchoklch(0.641 0.064 205.1)
Closest name: cadetblue (#5f9ea0)Relative luminance 0.2718

Colors that go with #5b989f

Charcoal, Copper and Blush Pink 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 #5b989f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9f625b

#5b9f84 · #5b769f

#9f5b98 · #989f5b

Split-complementary

Open in tool →

#9f5b76 · #9f845b

#845b9f · #9f625b · #769f5b

Contrast

#5b989f as textRatioAAAA largeAAAFix
Aaon white
3.26:1failpassfail
  • AA: use #4a7c82 as the text (4.67:1)
  • AAA: use #385d61 as the text (7.23:1)
  • AA: or shift the background to #262626 (4.64:1)
Aaon black
6.44:1passpassfail
  • AAA: use #649fa6 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b989f 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 #5b989f
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 #5b989f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b989f-a2b8be-df4e86-1f262d-e9f1ee?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