Color

#59b4e8

#59b4e8
hex#59b4e8
rgbrgb(89, 180, 232)
hslhsl(202, 76%, 63%)
oklchoklch(0.735 0.115 236.3)
Closest name: Cerulean (#55aaee)Relative luminance 0.4059

Colors that go with #59b4e8

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 →

#e88e59

#59e8d5 · #596ce8

#e859b4 · #b4e859

Split-complementary

Open in tool →

#e8596c · #e8d559

#d559e8 · #e88e59 · #6ce859

Contrast

#59b4e8 as textRatioAAAA largeAAAFix
Aaon white
2.3:1failfailfail
  • AA: use #187bb4 as the text (4.63:1)
  • AAA: use #125c87 as the text (7.23:1)
  • AA: or shift the background to #404040 (4.5:1)
  • AAA: or shift the background to #1f1f1f (7.16:1)
Aaon black
9.12:1passpasspassPasses 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 #59b4e8 as the background.

Brands using this color

Fonts for this mood

#59b4e8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #59b4e8
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 #59b4e8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/59b4e8-9cb1c4-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