Color

#3df5ef

#3df5ef
hex#3df5ef
rgbrgb(61, 245, 239)
hslhsl(178, 90%, 60%)
oklchoklch(0.882 0.141 191.5)
Closest name: Arctic Water (#00fcfc)Relative luminance 0.7253

Colors that go with #3df5ef

Charcoal, Deep Sky Blue and Taupe 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 →

#f53d43

#3df593 · #3d9ff5

#ef3df5 · #f5ef3d

Split-complementary

Open in tool →

#f53d9f · #f5933d

#933df5 · #f53d43 · #9ff53d

Contrast

#3df5ef as textRatioAAAA largeAAAFix
Aaon white
1.35:1failfailfail
  • AA: use #07837f as the text (4.6:1)
  • AAA: use #05615e as the text (7.3:1)
  • AA: or shift the background to #616161 (4.57:1)
  • AAA: or shift the background to #454545 (7.08:1)
Aaon black
15.51:1passpasspassPasses 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 #3df5ef 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 #3df5ef
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 #3df5ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3df5ef-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