Color

#5bb3e6

#5bb3e6
hex#5bb3e6
rgbrgb(91, 179, 230)
hslhsl(202, 74%, 63%)
oklchoklch(0.733 0.112 236.5)
Closest name: Blue Martini (#52b4d3)Relative luminance 0.4018

Colors that go with #5bb3e6

Charcoal, Dark Salmon 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 →

#e68e5b

#5be6d4 · #5b6de6

#e65bb3 · #b3e65b

Split-complementary

Open in tool →

#e65b6d · #e6d45b

#d45be6 · #e68e5b · #6de65b

Contrast

#5bb3e6 as textRatioAAAA largeAAAFix
Aaon white
2.32:1failfailfail
  • AA: use #1b7db6 as the text (4.51:1)
  • AAA: use #145c85 as the text (7.24:1)
  • AA: or shift the background to #3d3d3d (4.67:1)
  • AAA: or shift the background to #1f1f1f (7.09:1)
Aaon black
9.04:1passpasspassPasses 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 #5bb3e6 as the background.

Brands using this color

Fonts for this mood

#5bb3e6 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5bb3e6
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 #5bb3e6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5bb3e6-9cb1c4-df4e5f-1f222d-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