Color

#40a574

#40a574
hex#40a574
rgbrgb(64, 165, 116)
hslhsl(151, 44%, 45%)
oklchoklch(0.65 0.12 159.1)
Closest name: Cosmic Green (#30a877)Relative luminance 0.2926

Colors that go with #40a574

Charcoal, Blue and Crimson 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 →

#a54071

#40a542 · #40a4a5

#7440a5 · #a57440

Split-complementary

Open in tool →

#a540a4 · #a54240

#4240a5 · #a54071 · #a4a540

Contrast

#40a574 as textRatioAAAA largeAAAFix
Aaon white
3.06:1failpassfail
  • AA: use #33845d as the text (4.57:1)
  • AAA: use #276346 as the text (7.1:1)
  • AA: or shift the background to #2b2b2b (4.62:1)
Aaon black
6.85:1passpassfail
  • AAA: use #42a977 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40a574 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 #40a574
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 #40a574 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40a574-a2beb4-d459d0-1f2d2c-e9f1ea?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