Color

#5be421

#5be421
hex#5be421
rgbrgb(91, 228, 33)
hslhsl(102, 78%, 51%)
oklchoklch(0.811 0.246 139.1)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5782

Colors that go with #5be421

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 →

#a921e4

#bde421 · #21e448

#215be4 · #e4215b

Split-complementary

Open in tool →

#4821e4 · #e421bd

#21bde4 · #a921e4 · #e44821

Contrast

#5be421 as textRatioAAAA largeAAAFix
Aaon white
1.67:1failfailfail
  • AA: use #338410 as the text (4.72:1)
  • AAA: use #27640c as the text (7.21:1)
  • AA: or shift the background to #545454 (4.53:1)
  • AAA: or shift the background to #383838 (7.02:1)
Aaon black
12.56:1passpasspassPasses 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 #5be421 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 #5be421
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 #5be421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5be421-a7bea2-6e4edf-1f2d21-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