Color

#281df7

#281df7
hex#281df7
rgbrgb(40, 29, 247)
hslhsl(243, 93%, 54%)
oklchoklch(0.464 0.29 268.6)
Closest name: Bluebonnet (#1c1cf0)Relative luminance 0.0805

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ecf71d

#1d7ff7 · #951df7

#f7281d · #1df728

Split-complementary

Open in tool →

#f7951d · #7ff71d

#f71d7f · #ecf71d · #1df795

Contrast

#281df7 as textRatioAAAA largeAAAFix
Aaon white
8.05:1passpasspassPasses AAA — no fix needed.
Aaon black
2.61:1failfailfail
  • AA: use #6962f9 as the text (4.72:1)
  • AAA: use #8f89fb as the text (7.14:1)
  • AA: or shift the background to #c2c2c2 (4.52:1)
  • AAA: or shift the background to #f0f0f0 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #281df7 as the background.

Brands using this color

Fonts for this mood

#281df7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #281df7
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 #281df7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/281df7-a39cc4-dfa04e-261f2d-e9edf1?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