Color

#4fb1fc

#4fb1fc
hex#4fb1fc
rgbrgb(79, 177, 252)
hslhsl(206, 97%, 65%)
oklchoklch(0.734 0.142 244.7)
Closest name: Cerulean (#55aaee)Relative luminance 0.4013

Colors that go with #4fb1fc

Charcoal, Dark Orange and Amber 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 →

#fc9a4f

#4ffcf1 · #4f5bfc

#fc4fb1 · #b1fc4f

Split-complementary

Open in tool →

#fc4f5b · #fcf14f

#f14ffc · #fc9a4f · #5bfc4f

Contrast

#4fb1fc as textRatioAAAA largeAAAFix
Aaon white
2.33:1failfailfail
  • AA: use #0376ce as the text (4.68:1)
  • AAA: use #02599c as the text (7.21:1)
  • AA: or shift the background to #3d3d3d (4.67:1)
  • AAA: or shift the background to #1f1f1f (7.09:1)
Aaon black
9.03:1passpasspassPasses 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 #4fb1fc as the background.

Brands using this color

Fonts for this mood

#4fb1fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4fb1fc
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 #4fb1fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4fb1fc-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