Color

#40e137

#40e137
hex#40e137
rgbrgb(64, 225, 55)
hslhsl(117, 74%, 55%)
oklchoklch(0.797 0.243 142.3)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5522

Colors that go with #40e137

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 →

#d937e1

#95e137 · #37e184

#3740e1 · #e13740

Split-complementary

Open in tool →

#8437e1 · #e13795

#3795e1 · #d937e1 · #e18437

Contrast

#40e137 as textRatioAAAA largeAAAFix
Aaon white
1.74:1failfailfail
  • AA: use #1a8514 as the text (4.76:1)
  • AAA: use #14660f as the text (7.15:1)
  • AA: or shift the background to #4f4f4f (4.7:1)
  • AAA: or shift the background to #333333 (7.25:1)
Aaon black
12.04:1passpasspassPasses 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 #40e137 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 #40e137
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 #40e137 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40e137-a2bea4-924edf-1f2d25-edf1e9?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