Color

#55b3fc

#55b3fc
hex#55b3fc
rgbrgb(85, 179, 252)
hslhsl(206, 97%, 66%)
oklchoklch(0.741 0.138 244.8)
Closest name: Cerulean (#55aaee)Relative luminance 0.412

Colors that go with #55b3fc

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 →

#fc9d54

#54fcf1 · #545ffc

#fc54b4 · #b4fc54

Split-complementary

Open in tool →

#fc545f · #fcf154

#f154fc · #fc9d54 · #5ffc54

Contrast

#55b3fc as textRatioAAAA largeAAAFix
Aaon white
2.27:1failfailfail
  • AA: use #0376ce as the text (4.68:1)
  • AAA: use #02599c as the text (7.21:1)
  • AA: or shift the background to #404040 (4.56:1)
  • AAA: or shift the background to #212121 (7.08:1)
Aaon black
9.24:1passpasspassPasses 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 #55b3fc as the background.

Brands using this color

Fonts for this mood

#55b3fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #55b3fc
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 #55b3fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/55b3fc-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