Color

#045afb

#045afb
hex#045afb
rgbrgb(4, 90, 251)
hslhsl(219, 97%, 50%)
oklchoklch(0.538 0.249 262.2)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.143

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fba504

#04d6fb · #2904fb

#fb045a · #5afb04

Split-complementary

Open in tool →

#fb2904 · #d6fb04

#fb04d6 · #fba504 · #04fb29

Contrast

#045afb as textRatioAAAA largeAAAFix
Aaon white
5.44:1passpassfail
  • AAA: use #034cd3 as the text (7.05:1)
Aaon black
3.86:1failpassfail
  • AA: use #1d6bfc as the text (4.56:1)
  • AAA: use #5e96fd as the text (7.26:1)
  • AA: or shift the background to #ebebeb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #045afb as the background.

Brands using this color

Fonts for this mood

#045afb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #045afb
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 #045afb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/045afb-9ca5c4-df664e-211f2d-e9f0f1?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