Color

#0bb1fe

#0bb1fe
hex#0bb1fe
rgbrgb(11, 177, 254)
hslhsl(199, 99%, 52%)
oklchoklch(0.723 0.161 238.8)
Closest name: Cerulean (#55aaee)Relative luminance 0.3867

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fe580b

#0bfed1 · #0b38fe

#fe0bb1 · #b1fe0b

Split-complementary

Open in tool →

#fe0b38 · #fed10b

#d10bfe · #fe580b · #38fe0b

Contrast

#0bb1fe as textRatioAAAA largeAAAFix
Aaon white
2.4:1failfailfail
  • AA: use #017db7 as the text (4.55:1)
  • AAA: use #015e89 as the text (7.09:1)
  • AA: or shift the background to #3d3d3d (4.52:1)
  • AAA: or shift the background to #1c1c1c (7.09:1)
Aaon black
8.73:1passpasspassPasses 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 #0bb1fe as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0bb1fe reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0bb1fe
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 #0bb1fe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0bb1fe-9cb3c4-df4e66-1f232d-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