Color

#21ed65

#21ed65
hex#21ed65
rgbrgb(33, 237, 101)
hslhsl(140, 85%, 53%)
oklchoklch(0.828 0.233 147.9)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.6183

Colors that go with #21ed65

Royal 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 →

#ed21a9

#43ed21 · #21edcb

#6521ed · #ed6521

Split-complementary

Open in tool →

#cb21ed · #ed2143

#2143ed · #ed21a9 · #edcb21

Contrast

#21ed65 as textRatioAAAA largeAAAFix
Aaon white
1.57:1failfailfail
  • AA: use #0b8935 as the text (4.52:1)
  • AAA: use #086326 as the text (7.44:1)
  • AA: or shift the background to #575757 (4.6:1)
  • AAA: or shift the background to #3b3b3b (7.13:1)
Aaon black
13.37:1passpasspassPasses 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 #21ed65 as the background.

Brands using this color

mcpConnect your agent — build around #21ed65
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 #21ed65 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21ed65-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