Color

#3bb5b3

#3bb5b3
hex#3bb5b3
rgbrgb(59, 181, 179)
hslhsl(179, 51%, 47%)
oklchoklch(0.707 0.105 193.5)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3723

Colors that go with #3bb5b3

Charcoal, Denim 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 →

#b53b3d

#3bb576 · #3b7ab5

#b33bb5 · #b5b33b

Split-complementary

Open in tool →

#b53b7a · #b5763b

#763bb5 · #b53b3d · #7ab53b

Contrast

#3bb5b3 as textRatioAAAA largeAAAFix
Aaon white
2.49:1failfailfail
  • AA: use #2a8381 as the text (4.5:1)
  • AAA: use #1f605f as the text (7.25:1)
  • AA: or shift the background to #3b3b3b (4.51:1)
  • AAA: or shift the background to #1a1a1a (7:1)
Aaon black
8.45:1passpasspassPasses 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 #3bb5b3 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 #3bb5b3
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 #3bb5b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bb5b3-a2bbbe-d45996-1f272d-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