Color

#3bc9bb

#3bc9bb
hex#3bc9bb
rgbrgb(59, 201, 187)
hslhsl(174, 57%, 51%)
oklchoklch(0.759 0.119 185.3)
Closest name: Cockatoo (#58c8b6)Relative luminance 0.4629

Colors that go with #3bc9bb

Charcoal, Crimson and Dodger 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c93b49

#3bc974 · #3b90c9

#bb3bc9 · #c9bb3b

Split-complementary

Open in tool →

#c93b90 · #c9743b

#743bc9 · #c93b49 · #90c93b

Contrast

#3bc9bb as textRatioAAAA largeAAAFix
Aaon white
2.05:1failfailfail
  • AA: use #24847b as the text (4.5:1)
  • AAA: use #1a6059 as the text (7.34:1)
  • AA: or shift the background to #474747 (4.54:1)
  • AAA: or shift the background to #292929 (7.11:1)
Aaon black
10.26:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3bc9bb 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 #3bc9bb
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 #3bc9bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bc9bb-a2bebe-d459a1-1f292d-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