Color

#40e2d5

#40e2d5
hex#40e2d5
rgbrgb(64, 226, 213)
hslhsl(175, 74%, 57%)
oklchoklch(0.829 0.131 187)
Closest name: turquoise (#40e0d0)Relative luminance 0.6029

Colors that go with #40e2d5

Charcoal, Deep Sky 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 →

#e2404e

#40e284 · #409fe2

#d540e2 · #e2d540

Split-complementary

Open in tool →

#e2409f · #e28440

#8440e2 · #e2404e · #9fe240

Contrast

#40e2d5 as textRatioAAAA largeAAAFix
Aaon white
1.61:1failfailfail
  • AA: use #138178 as the text (4.73:1)
  • AAA: use #0f625b as the text (7.2:1)
  • AA: or shift the background to #545454 (4.71:1)
  • AAA: or shift the background to #383838 (7.29:1)
Aaon black
13.06:1passpasspassPasses 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 #40e2d5 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 #40e2d5
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 #40e2d5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40e2d5-a2bdbe-d4599f-1f282d-e9f1ed?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