Color

#55e421

#55e421
hex#55e421
rgbrgb(85, 228, 33)
hslhsl(104, 78%, 51%)
oklchoklch(0.809 0.249 139.6)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5753

Colors that go with #55e421

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 →

#b021e4

#b6e421 · #21e44e

#2155e4 · #e42155

Split-complementary

Open in tool →

#4e21e4 · #e421b6

#21b6e4 · #b021e4 · #e44e21

Contrast

#55e421 as textRatioAAAA largeAAAFix
Aaon white
1.68:1failfailfail
  • AA: use #318811 as the text (4.51:1)
  • AAA: use #24640c as the text (7.23:1)
  • AA: or shift the background to #545454 (4.51:1)
  • AAA: or shift the background to #363636 (7.2:1)
Aaon black
12.51:1passpasspassPasses 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 #55e421 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 #55e421
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 #55e421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/55e421-a6bea2-724edf-1f2d22-eff1e9?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