Color

#3fabfd

#3fabfd
hex#3fabfd
rgbrgb(63, 171, 253)
hslhsl(206, 98%, 62%)
oklchoklch(0.717 0.154 245.6)
Closest name: Cerulean (#55aaee)Relative luminance 0.3727

Colors that go with #3fabfd

Charcoal, Amber and Blue 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 →

#fd913f

#3ffdf0 · #3f4cfd

#fd3fab · #abfd3f

Split-complementary

Open in tool →

#fd3f4c · #fdf03f

#f03ffd · #fd913f · #4cfd3f

Contrast

#3fabfd as textRatioAAAA largeAAAFix
Aaon white
2.48:1failfailfail
  • AA: use #0276cf as the text (4.67:1)
  • AAA: use #02599d as the text (7.2:1)
  • AA: or shift the background to #3b3b3b (4.51:1)
  • AAA: or shift the background to #1a1a1a (7.01:1)
Aaon black
8.45:1passpasspassPasses 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 #3fabfd as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/3fabfd-9caec4-df4e56-1f212d-e9f1f1?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