Color

#78d3cc

#78d3cc
hex#78d3cc
rgbrgb(120, 211, 204)
hslhsl(175, 51%, 65%)
oklchoklch(0.808 0.088 189.2)
Closest name: Hidden Sea Glass (#6fd1c9)Relative luminance 0.5494

Colors that go with #78d3cc

Charcoal, Light Coral 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 →

#d37880

#78d39e · #78add3

#cc78d3 · #d3cc78

Split-complementary

Open in tool →

#d378ad · #d39e78

#9e78d3 · #d37880 · #add378

Contrast

#78d3cc as textRatioAAAA largeAAAFix
Aaon white
1.75:1failfailfail
  • AA: use #2a837c as the text (4.53:1)
  • AAA: use #1f605b as the text (7.29:1)
  • AA: or shift the background to #4f4f4f (4.68:1)
  • AAA: or shift the background to #333333 (7.21:1)
Aaon black
11.99:1passpasspassPasses 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 #78d3cc as the background.

Brands using this color

mcpConnect your agent — build around #78d3cc
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 #78d3cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/78d3cc-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