Color

#40ed4e

#40ed4e
hex#40ed4e
rgbrgb(64, 237, 78)
hslhsl(125, 83%, 59%)
oklchoklch(0.83 0.243 144)
Closest name: Becquerel (#4bec13)Relative luminance 0.6221

Colors that go with #40ed4e

Violet, Deep Sky Blue 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 →

#ed40df

#88ed40 · #40eda5

#4e40ed · #ed4e40

Split-complementary

Open in tool →

#a540ed · #ed4088

#4088ed · #ed40df · #eda540

Contrast

#40ed4e as textRatioAAAA largeAAAFix
Aaon white
1.56:1failfailfail
  • AA: use #0d8717 as the text (4.67:1)
  • AAA: use #0a6711 as the text (7.09:1)
  • AA: or shift the background to #575757 (4.63:1)
  • AAA: or shift the background to #3b3b3b (7.17:1)
Aaon black
13.44:1passpasspassPasses 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 #40ed4e as the background.

Brands using this color

mcpConnect your agent — build around #40ed4e
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 #40ed4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40ed4e-a2bea7-a54edf-1f2d26-ecf1e9?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