Color

#40ea1a

#40ea1a
hex#40ea1a
rgbrgb(64, 234, 26)
hslhsl(109, 83%, 51%)
oklchoklch(0.819 0.263 141.1)
Closest name: Becquerel (#4bec13)Relative luminance 0.6001

Colors that go with #40ea1a

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 →

#c41aea

#a8ea1a · #1aea5c

#1a40ea · #ea1a40

Split-complementary

Open in tool →

#5c1aea · #ea1aa8

#1aa8ea · #c41aea · #ea5c1a

Contrast

#40ea1a as textRatioAAAA largeAAAFix
Aaon white
1.62:1failfailfail
  • AA: use #23870d as the text (4.62:1)
  • AAA: use #1b670a as the text (7.02:1)
  • AA: or shift the background to #545454 (4.69:1)
  • AAA: or shift the background to #383838 (7.26:1)
Aaon black
13:1passpasspassPasses 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 #40ea1a 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 #40ea1a
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 #40ea1a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40ea1a-a4bea2-7e4edf-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