Color

#40a09c

#40a09c
hex#40a09c
rgbrgb(64, 160, 156)
hslhsl(178, 43%, 44%)
oklchoklch(0.648 0.089 191.4)
Closest name: Baltic (#279d9f)Relative luminance 0.2863

Colors that go with #40a09c

Charcoal, Copper 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.

Real palettes that use #40a09c

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#a04043

#40a06d · #4073a0

#9d40a0 · #a09d40

Split-complementary

Open in tool →

#a04073 · #a06d40

#6d40a0 · #a04043 · #73a040

Contrast

#40a09c as textRatioAAAA largeAAAFix
Aaon white
3.12:1failpassfail
  • AA: use #33807d as the text (4.64:1)
  • AAA: use #265f5d as the text (7.3:1)
  • AA: or shift the background to #2b2b2b (4.54:1)
Aaon black
6.73:1passpassfail
  • AAA: use #41a4a1 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40a09c 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 #40a09c
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 #40a09c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40a09c-a2bcbe-d45999-1f282d-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