Color

#0b9bcb

#0b9bcb
hex#0b9bcb
rgbrgb(11, 155, 203)
hslhsl(195, 90%, 42%)
oklchoklch(0.646 0.126 229.5)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.2783

Colors that go with #0b9bcb

Charcoal, Amber and 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.

Real palettes that use #0b9bcb

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#cb3b0b

#0bcb9b · #0b3bcb

#cb0b9b · #9bcb0b

Split-complementary

Open in tool →

#cb0b3b · #cb9b0b

#9b0bcb · #cb3b0b · #3bcb0b

Contrast

#0b9bcb as textRatioAAAA largeAAAFix
Aaon white
3.2:1failpassfail
  • AA: use #097ea5 as the text (4.63:1)
  • AAA: use #07607e as the text (7.04:1)
  • AA: or shift the background to #292929 (4.55:1)
Aaon black
6.57:1passpassfail
  • AAA: use #0ba3d5 as the text (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b9bcb as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#0b9bcb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b9bcb
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 #0b9bcb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b9bcb-9cb5c4-df4e70-1f242d-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