Color

#6f899b

#6f899b
hex#6f899b
rgbrgb(111, 137, 155)
hslhsl(205, 18%, 52%)
oklchoklch(0.616 0.04 238.5)
Closest name: lightslategray (#778899)Relative luminance 0.2364

Colors that go with #6f899b

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9b816f

#6f9b97 · #6f729b

#9b6f88 · #889b6f

Split-complementary

Open in tool →

#9b6f72 · #9b976f

#976f9b · #9b816f · #729b6f

Contrast

#6f899b as textRatioAAAA largeAAAFix
Aaon white
3.67:1failpassfail
  • AA: use #60798a as the text (4.57:1)
  • AAA: use #475966 as the text (7.27:1)
  • AA: or shift the background to #1c1c1c (4.65:1)
Aaon black
5.73:1passpassfail
  • AAA: use #849aa9 as the text (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6f899b as the background.

Brands using this color

mcpConnect your agent — build around #6f899b
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 #6f899b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6f899b-9cafc4-df4e58-1f212d-e9f1f0?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