Color

#3fcab1

#3fcab1
hex#3fcab1
rgbrgb(63, 202, 177)
hslhsl(169, 57%, 52%)
oklchoklch(0.759 0.123 178.2)
Closest name: Cockatoo (#58c8b6)Relative luminance 0.4647

Colors that go with #3fcab1

Charcoal, Blue and Crimson 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 →

#ca3f58

#3fca6b · #3f9eca

#b13fca · #cab13f

Split-complementary

Open in tool →

#ca3f9e · #ca6b3f

#6b3fca · #ca3f58 · #9eca3f

Contrast

#3fcab1 as textRatioAAAA largeAAAFix
Aaon white
2.04:1failfailfail
  • AA: use #248473 as the text (4.54:1)
  • AAA: use #1a6053 as the text (7.39:1)
  • AA: or shift the background to #474747 (4.55:1)
  • AAA: or shift the background to #292929 (7.13:1)
Aaon black
10.29:1passpasspassPasses 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 #3fcab1 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 #3fcab1
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 #3fcab1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fcab1-a2bebc-d459ab-1f2a2d-e9f1ec?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