Color

#0901ef

#0901ef
hex#0901ef
rgbrgb(9, 1, 239)
hslhsl(242, 99%, 47%)
oklchoklch(0.432 0.297 264.7)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0631

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e7ef01

#0170ef · #8001ef

#ef0901 · #01ef09

Split-complementary

Open in tool →

#ef8001 · #70ef01

#ef0170 · #e7ef01 · #01ef80

Contrast

#0901ef as textRatioAAAA largeAAAFix
Aaon white
9.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.26:1failfailfail
  • AA: use #625dfe as the text (4.52:1)
  • AAA: use #8e8afe as the text (7.22:1)
  • AA: or shift the background to #b5b5b5 (4.53:1)
  • AAA: or shift the background to #e0e0e0 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0901ef as the background.

Brands using this color

Fonts for this mood

#0901ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0901ef
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 #0901ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0901ef-a29cc4-df9e4e-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