Color

#304ffd

#304ffd
hex#304ffd
rgbrgb(48, 79, 253)
hslhsl(231, 98%, 59%)
oklchoklch(0.531 0.257 267.6)
Closest name: Bluerocratic (#1f66ff)Relative luminance 0.1331

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fdde30

#30b5fd · #7830fd

#fd304f · #4ffd30

Split-complementary

Open in tool →

#fd7830 · #b5fd30

#fd30b5 · #fdde30 · #30fd78

Contrast

#304ffd as textRatioAAAA largeAAAFix
Aaon white
5.73:1passpassfail
  • AAA: use #1235fd as the text (7.11:1)
Aaon black
3.66:1failpassfail
  • AA: use #4964fd as the text (4.52:1)
  • AAA: use #7c8ffe as the text (7.22:1)
  • AA: or shift the background to #e6e6e6 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #304ffd as the background.

Brands using this color

Fonts for this mood

#304ffd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #304ffd
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 #304ffd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/304ffd-9c9ec4-df834e-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