Color

#0cb9e4

#0cb9e4
hex#0cb9e4
rgbrgb(12, 185, 228)
hslhsl(192, 90%, 47%)
oklchoklch(0.729 0.134 222.6)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.4038

Colors that go with #0cb9e4

Charcoal, Denim and Dodger Blue 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 →

#e4370c

#0ce4a3 · #0c4de4

#e40cb9 · #b9e40c

Split-complementary

Open in tool →

#e40c4d · #e4a30c

#a30ce4 · #e4370c · #4de40c

Contrast

#0cb9e4 as textRatioAAAA largeAAAFix
Aaon white
2.31:1failfailfail
  • AA: use #087e9b as the text (4.7:1)
  • AAA: use #065e74 as the text (7.34:1)
  • AA: or shift the background to #3d3d3d (4.69:1)
  • AAA: or shift the background to #1f1f1f (7.12:1)
Aaon black
9.08:1passpasspassPasses 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 #0cb9e4 as the background.

Brands using this color

Fonts for this mood

#0cb9e4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0cb9e4
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 #0cb9e4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0cb9e4-a2b5be-df4e77-1f242d-e9f1ef?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