Color

#5bb0f5

#5bb0f5
hex#5bb0f5
rgbrgb(91, 176, 245)
hslhsl(207, 89%, 66%)
oklchoklch(0.733 0.13 245.4)
Closest name: Cerulean (#55aaee)Relative luminance 0.3987

Colors that go with #5bb0f5

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 →

#f5a15b

#5bf5ee · #5b63f5

#f55bb0 · #b0f55b

Split-complementary

Open in tool →

#f55b63 · #f5ee5b

#ee5bf5 · #f5a15b · #63f55b

Contrast

#5bb0f5 as textRatioAAAA largeAAAFix
Aaon white
2.34:1failfailfail
  • AA: use #0c77cf as the text (4.61:1)
  • AAA: use #09599a as the text (7.22:1)
  • AA: or shift the background to #3d3d3d (4.64:1)
  • AAA: or shift the background to #1f1f1f (7.04:1)
Aaon black
8.97:1passpasspassPasses 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 #5bb0f5 as the background.

Brands using this color

Fonts for this mood

#5bb0f5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5bb0f5
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 #5bb0f5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5bb0f5-9cadc4-df4e53-1f212d-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