Color

#40e218

#40e218
hex#40e218
rgbrgb(64, 226, 24)
hslhsl(108, 81%, 49%)
oklchoklch(0.798 0.256 140.9)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5555

Colors that go with #40e218

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 →

#ba18e2

#a5e218 · #18e254

#1840e2 · #e21840

Split-complementary

Open in tool →

#5418e2 · #e218a5

#18a5e2 · #ba18e2 · #e25418

Contrast

#40e218 as textRatioAAAA largeAAAFix
Aaon white
1.73:1failfailfail
  • AA: use #26860e as the text (4.67:1)
  • AAA: use #1d660b as the text (7.1:1)
  • AA: or shift the background to #525252 (4.51:1)
  • AAA: or shift the background to #333333 (7.29:1)
Aaon black
12.11:1passpasspassPasses 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 #40e218 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 #40e218
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 #40e218 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40e218-a4bea2-7c4edf-1f2d23-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