Color

#4255ff

#4255ff
hex#4255ff
rgbrgb(66, 85, 255)
hslhsl(234, 100%, 63%)
oklchoklch(0.55 0.249 270.4)
Closest name: Bluerocratic (#1f66ff)Relative luminance 0.1488

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ffec42

#42b4ff · #8e42ff

#ff4255 · #55ff42

Split-complementary

Open in tool →

#ff8e42 · #b4ff42

#ff42b4 · #ffec42 · #42ff8e

Contrast

#4255ff as textRatioAAAA largeAAAFix
Aaon white
5.28:1passpassfail
  • AAA: use #1a30ff as the text (7.21:1)
Aaon black
3.98:1failpassfail
  • AA: use #5263ff as the text (4.59:1)
  • AAA: use #808cff as the text (7.11:1)
  • AA: or shift the background to #ededed (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 #4255ff as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#4255ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4255ff
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 #4255ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4255ff-9d9cc4-df8a4e-241f2d-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