Color

#0104cb

#0104cb
hex#0104cb
rgbrgb(1, 4, 203)
hslhsl(239, 99%, 40%)
oklchoklch(0.383 0.262 264.2)
Closest name: mediumblue (#0000cd)Relative luminance 0.0441

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cbc801

#0169cb · #6301cb

#cb0104 · #04cb01

Split-complementary

Open in tool →

#cb6301 · #69cb01

#cb0169 · #cbc801 · #01cb63

Contrast

#0104cb as textRatioAAAA largeAAAFix
Aaon white
11.16:1passpasspassPasses AAA — no fix needed.
Aaon black
1.88:1failfailfail
  • AA: use #5d5ffe as the text (4.53:1)
  • AAA: use #8a8cfe as the text (7.26:1)
  • AA: or shift the background to #a6a6a6 (4.59:1)
  • AAA: or shift the background to #cfcfcf (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0104cb as the background.

Brands using this color

Fonts for this mood

#0104cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0104cb
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 #0104cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0104cb-a09cc4-df964e-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