Color

#3bf9fc

#3bf9fc
hex#3bf9fc
rgbrgb(59, 249, 252)
hslhsl(181, 97%, 61%)
oklchoklch(0.895 0.143 196.6)
Closest name: Aggressive Aqua (#00fbff)Relative luminance 0.7571

Colors that go with #3bf9fc

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 →

#fc3e3b

#3bfc9f · #3b98fc

#fc3bf9 · #f9fc3b

Split-complementary

Open in tool →

#fc3b98 · #fc9f3b

#9f3bfc · #fc3e3b · #98fc3b

Contrast

#3bf9fc as textRatioAAAA largeAAAFix
Aaon white
1.3:1failfailfail
  • AA: use #028083 as the text (4.75:1)
  • AAA: use #026364 as the text (7.07:1)
  • AA: or shift the background to #636363 (4.62:1)
  • AAA: or shift the background to #474747 (7.14:1)
Aaon black
16.14:1passpasspassPasses 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 #3bf9fc as the background.

Brands using this color

Fonts for this mood

#3bf9fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3bf9fc
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 #3bf9fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3bf9fc-a2babe-d45992-1f272d-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