Color

#3fca6d

#3fca6d
hex#3fca6d
rgbrgb(63, 202, 109)
hslhsl(140, 57%, 52%)
oklchoklch(0.744 0.177 150.3)
Closest name: Emerald Green (#50c878)Relative luminance 0.444

Colors that go with #3fca6d

Charcoal, Blue and Royal 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 →

#ca3f9c

#56ca3f · #3fcab3

#6d3fca · #ca6d3f

Split-complementary

Open in tool →

#b33fca · #ca3f56

#3f56ca · #ca3f9c · #cab33f

Contrast

#3fca6d as textRatioAAAA largeAAAFix
Aaon white
2.13:1failfailfail
  • AA: use #248444 as the text (4.71:1)
  • AAA: use #1b6434 as the text (7.19:1)
  • AA: or shift the background to #454545 (4.51:1)
  • AAA: or shift the background to #262626 (7.12:1)
Aaon black
9.88:1passpasspassPasses 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 #3fca6d as the background.

Brands using this color

mcpConnect your agent — build around #3fca6d
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 #3fca6d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fca6d-a2beaf-c259d4-1f2d2a-ebf1e9?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