Color

#3fc675

#3fc675
hex#3fc675
rgbrgb(63, 198, 117)
hslhsl(144, 54%, 51%)
oklchoklch(0.735 0.165 152.9)
Closest name: Emerald Green (#50c878)Relative luminance 0.4273

Colors that go with #3fc675

Charcoal, Blue and Mustard Yellow 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 →

#c63f90

#4cc63f · #3fc6b8

#753fc6 · #c6753f

Split-complementary

Open in tool →

#b83fc6 · #c63f4c

#3f4cc6 · #c63f90 · #c6b83f

Contrast

#3fc675 as textRatioAAAA largeAAAFix
Aaon white
2.2:1failfailfail
  • AA: use #28864d as the text (4.56:1)
  • AAA: use #1d6239 as the text (7.35:1)
  • AA: or shift the background to #424242 (4.57:1)
  • AAA: or shift the background to #242424 (7.06:1)
Aaon black
9.55:1passpasspassPasses 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 #3fc675 as the background.

Brands using this color

mcpConnect your agent — build around #3fc675
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 #3fc675 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fc675-a2beb0-ca59d4-1f2d2b-eaf1e9?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