Color

#40ce5a

#40ce5a
hex#40ce5a
rgbrgb(64, 206, 90)
hslhsl(131, 59%, 53%)
oklchoklch(0.751 0.198 146.3)
Closest name: Battletoad (#11cc55)Relative luminance 0.4597

Colors that go with #40ce5a

Blue, Charcoal 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 →

#ce40b4

#6dce40 · #40cea1

#5a40ce · #ce5a40

Split-complementary

Open in tool →

#a140ce · #ce406d

#406dce · #ce40b4 · #cea140

Contrast

#40ce5a as textRatioAAAA largeAAAFix
Aaon white
2.06:1failfailfail
  • AA: use #238635 as the text (4.63:1)
  • AAA: use #1a6528 as the text (7.15:1)
  • AA: or shift the background to #474747 (4.51:1)
  • AAA: or shift the background to #292929 (7.06:1)
Aaon black
10.19:1passpasspassPasses 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 #40ce5a as the background.

Brands using this color

mcpConnect your agent — build around #40ce5a
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 #40ce5a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40ce5a-a2beaa-b34edf-1f2d28-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