Color

#05b0fa

#05b0fa
hex#05b0fa
rgbrgb(5, 176, 250)
hslhsl(198, 96%, 50%)
oklchoklch(0.718 0.158 237.7)
Closest name: Cerulean (#55aaee)Relative luminance 0.3799

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fa4f05

#05fac9 · #0536fa

#fa05b0 · #b0fa05

Split-complementary

Open in tool →

#fa0536 · #fac905

#c905fa · #fa4f05 · #36fa05

Contrast

#05b0fa as textRatioAAAA largeAAAFix
Aaon white
2.44:1failfailfail
  • AA: use #047caf as the text (4.66:1)
  • AAA: use #035f87 as the text (7.02:1)
  • AA: or shift the background to #3b3b3b (4.59:1)
  • AAA: or shift the background to #1a1a1a (7.13:1)
Aaon black
8.6:1passpasspassPasses 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 #05b0fa as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#05b0fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #05b0fa
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 #05b0fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/05b0fa-9cb3c4-df4e69-1f232d-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