Color

#010def

#010def
hex#010def
rgbrgb(1, 13, 239)
hslhsl(237, 99%, 47%)
oklchoklch(0.435 0.295 264.2)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0653

Tints & shades

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

Harmonies

Complementary

Open in tool →

#efe301

#0184ef · #6c01ef

#ef010d · #0def01

Split-complementary

Open in tool →

#ef6c01 · #84ef01

#ef0184 · #efe301 · #01ef6c

Contrast

#010def as textRatioAAAA largeAAAFix
Aaon white
9.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.31:1failfailfail
  • AA: use #5860fe as the text (4.52:1)
  • AAA: use #858bfe as the text (7.12:1)
  • AA: or shift the background to #b8b8b8 (4.59:1)
  • AAA: or shift the background to #e3e3e3 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #010def as the background.

Brands using this color

Fonts for this mood

#010def reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #010def
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 #010def and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/010def-9f9cc4-df924e-251f2d-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