Color

#284bfb

#284bfb
hex#284bfb
rgbrgb(40, 75, 251)
hslhsl(230, 96%, 57%)
oklchoklch(0.52 0.26 266.7)
Closest name: C64 Blue (#003aff)Relative luminance 0.1245

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbd828

#28b4fb · #6e28fb

#fb284b · #4bfb28

Split-complementary

Open in tool →

#fb6e28 · #b4fb28

#fb28b4 · #fbd828 · #28fb6e

Contrast

#284bfb as textRatioAAAA largeAAAFix
Aaon white
6.02:1passpassfail
  • AAA: use #0f36fa as the text (7.17:1)
Aaon black
3.49:1failpassfail
  • AA: use #4b68fb as the text (4.67:1)
  • AAA: use #788efc as the text (7.07:1)
  • AA: or shift the background to #e0e0e0 (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 #284bfb as the background.

Brands using this color

Fonts for this mood

#284bfb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #284bfb
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 #284bfb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/284bfb-9c9ec4-df814e-231f2d-e9eef1?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