Color

#3bb5af

#3bb5af
hex#3bb5af
rgbrgb(59, 181, 175)
hslhsl(177, 51%, 47%)
oklchoklch(0.706 0.106 190.3)
Closest name: lightseagreen (#20b2aa)Relative luminance 0.3707

Colors that go with #3bb5af

Charcoal, Denim and Midnight 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 →

#b53b41

#3bb572 · #3b7eb5

#af3bb5 · #b5af3b

Split-complementary

Open in tool →

#b53b7e · #b5723b

#723bb5 · #b53b41 · #7eb53b

Contrast

#3bb5af as textRatioAAAA largeAAAFix
Aaon white
2.5:1failfailfail
  • AA: use #2a837e as the text (4.52:1)
  • AAA: use #1f605d as the text (7.27:1)
  • AA: or shift the background to #383838 (4.7:1)
  • AAA: or shift the background to #171717 (7.18:1)
Aaon black
8.41:1passpasspassPasses 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 #3bb5af 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 #3bb5af
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 #3bb5af and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bb5af-a2bcbe-d4599b-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