Color

#1004fb

#1004fb
hex#1004fb
rgbrgb(16, 4, 251)
hslhsl(243, 97%, 50%)
oklchoklch(0.45 0.307 265.2)
Closest name: blue (#0000ff)Relative luminance 0.0716

Colors that go with #1004fb

Charcoal, Crimson and Cobalt Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#effb04

#0473fb · #8c04fb

#fb1004 · #04fb10

Split-complementary

Open in tool →

#fb8c04 · #73fb04

#fb0473 · #effb04 · #04fb8c

Contrast

#1004fb as textRatioAAAA largeAAAFix
Aaon white
8.63:1passpasspassPasses AAA — no fix needed.
Aaon black
2.43:1failfailfail
  • AA: use #665efd as the text (4.58:1)
  • AAA: use #918bfd as the text (7.32:1)
  • AA: or shift the background to #bdbdbd (4.6:1)
  • AAA: or shift the background to #e8e8e8 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1004fb as the background.

Brands using this color

Fonts for this mood

#1004fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1004fb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1004fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1004fb-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