Color

#0bb5cb

#0bb5cb
hex#0bb5cb
rgbrgb(11, 181, 203)
hslhsl(187, 90%, 42%)
oklchoklch(0.709 0.121 210.2)
Closest name: Aquarius (#2db0ce)Relative luminance 0.3743

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cb210b

#0bcb82 · #0b55cb

#cb0bb5 · #b5cb0b

Split-complementary

Open in tool →

#cb0b55 · #cb820b

#820bcb · #cb210b · #55cb0b

Contrast

#0bb5cb as textRatioAAAA largeAAAFix
Aaon white
2.47:1failfailfail
  • AA: use #088191 as the text (4.61:1)
  • AAA: use #065f6b as the text (7.35:1)
  • AA: or shift the background to #3b3b3b (4.53:1)
  • AAA: or shift the background to #1a1a1a (7.03:1)
Aaon black
8.49:1passpasspassPasses 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 #0bb5cb as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0bb5cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0bb5cb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0bb5cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0bb5cb-a2b8be-df4e83-1f262d-e9f1ee?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