Color

#3fe222

#3fe222
hex#3fe222
rgbrgb(63, 226, 34)
hslhsl(111, 77%, 51%)
oklchoklch(0.798 0.253 141.3)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5556

Colors that go with #3fe222

Deep Sky Blue, Taupe and Violet 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 →

#c522e2

#9fe222 · #22e265

#223fe2 · #e2223f

Split-complementary

Open in tool →

#6522e2 · #e2229f

#229fe2 · #c522e2 · #e26522

Contrast

#3fe222 as textRatioAAAA largeAAAFix
Aaon white
1.73:1failfailfail
  • AA: use #238712 as the text (4.62:1)
  • AAA: use #1a630d as the text (7.41:1)
  • AA: or shift the background to #525252 (4.51:1)
  • AAA: or shift the background to #333333 (7.29:1)
Aaon black
12.11:1passpasspassPasses 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 #3fe222 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 #3fe222
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 #3fe222 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fe222-a3bea2-834edf-1f2d23-eef1e9?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