Color

#3fe49a

#3fe49a
hex#3fe49a
rgbrgb(63, 228, 154)
hslhsl(153, 75%, 57%)
oklchoklch(0.818 0.17 158.9)
Closest name: Grotesque Green (#64e986)Relative luminance 0.5888

Colors that go with #3fe49a

Deep Sky Blue, Mustard Yellow 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 →

#e43f89

#3fe447 · #3fdbe4

#9a3fe4 · #e49a3f

Split-complementary

Open in tool →

#e43fdb · #e4473f

#473fe4 · #e43f89 · #dbe43f

Contrast

#3fe49a as textRatioAAAA largeAAAFix
Aaon white
1.64:1failfailfail
  • AA: use #138652 as the text (4.61:1)
  • AAA: use #0e623c as the text (7.42:1)
  • AA: or shift the background to #545454 (4.61:1)
  • AAA: or shift the background to #383838 (7.13:1)
Aaon black
12.78:1passpasspassPasses 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 #3fe49a 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 #3fe49a
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 #3fe49a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fe49a-a2beb5-d459cc-1f2d2d-e9f1ea?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