Color

#0456fb

#0456fb
hex#0456fb
rgbrgb(4, 86, 251)
hslhsl(220, 97%, 50%)
oklchoklch(0.531 0.254 262.6)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1365

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fba904

#04d2fb · #2d04fb

#fb0456 · #56fb04

Split-complementary

Open in tool →

#fb2d04 · #d2fb04

#fb04d2 · #fba904 · #04fb2d

Contrast

#0456fb as textRatioAAAA largeAAAFix
Aaon white
5.63:1passpassfail
  • AAA: use #034ad8 as the text (7.06:1)
Aaon black
3.73:1failpassfail
  • AA: use #226bfc as the text (4.58:1)
  • AAA: use #5e93fd as the text (7.07:1)
  • AA: or shift the background to #e6e6e6 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0456fb as the background.

Brands using this color

Fonts for this mood

#0456fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0456fb
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 #0456fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0456fb-9ca5c4-df694e-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