Color

#40c975

#40c975
hex#40c975
rgbrgb(64, 201, 117)
hslhsl(143, 56%, 52%)
oklchoklch(0.743 0.168 152.4)
Closest name: Emerald Green (#50c878)Relative luminance 0.4415

Colors that go with #40c975

Charcoal, Blue and Mustard Yellow 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 →

#c94095

#50c940 · #40c9b9

#7540c9 · #c97540

Split-complementary

Open in tool →

#b940c9 · #c94050

#4050c9 · #c94095 · #c9b940

Contrast

#40c975 as textRatioAAAA largeAAAFix
Aaon white
2.14:1failfailfail
  • AA: use #26874b as the text (4.52:1)
  • AAA: use #1c6337 as the text (7.27:1)
  • AA: or shift the background to #424242 (4.7:1)
  • AAA: or shift the background to #262626 (7.08:1)
Aaon black
9.83:1passpasspassPasses 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 #40c975 as the background.

Brands using this color

mcpConnect your agent — build around #40c975
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 #40c975 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40c975-a2beb0-c859d4-1f2d2b-eaf1e9?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