Color

#53aef9

#53aef9
hex#53aef9
rgbrgb(83, 174, 249)
hslhsl(207, 93%, 65%)
oklchoklch(0.728 0.14 246.2)
Closest name: Cerulean (#55aaee)Relative luminance 0.3895

Colors that go with #53aef9

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 →

#f99d53

#53f9f0 · #535bf9

#f953ae · #aef953

Split-complementary

Open in tool →

#f9535b · #f9f053

#f053f9 · #f99d53 · #5bf953

Contrast

#53aef9 as textRatioAAAA largeAAAFix
Aaon white
2.39:1failfailfail
  • AA: use #0878d4 as the text (4.52:1)
  • AAA: use #06599d as the text (7.18:1)
  • AA: or shift the background to #3d3d3d (4.55:1)
  • AAA: or shift the background to #1c1c1c (7.13:1)
Aaon black
8.79:1passpasspassPasses 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 #53aef9 as the background.

Brands using this color

Fonts for this mood

#53aef9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #53aef9
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 #53aef9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/53aef9-9cadc4-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