Color

#45b0fc

#45b0fc
hex#45b0fc
rgbrgb(69, 176, 252)
hslhsl(205, 97%, 63%)
oklchoklch(0.729 0.147 243.6)
Closest name: Cerulean (#55aaee)Relative luminance 0.3934

Colors that go with #45b0fc

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 →

#fc9145

#45fced · #4554fc

#fc45b0 · #b0fc45

Split-complementary

Open in tool →

#fc4554 · #fced45

#ed45fc · #fc9145 · #54fc45

Contrast

#45b0fc as textRatioAAAA largeAAAFix
Aaon white
2.37:1failfailfail
  • AA: use #0379ce as the text (4.54:1)
  • AAA: use #025997 as the text (7.3:1)
  • AA: or shift the background to #3d3d3d (4.59:1)
  • AAA: or shift the background to #1c1c1c (7.2:1)
Aaon black
8.87:1passpasspassPasses 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 #45b0fc as the background.

Brands using this color

Fonts for this mood

#45b0fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #45b0fc
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 #45b0fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/45b0fc-9cafc4-df4e58-1f212d-e9f1f0?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