Color

#043aec

#043aec
hex#043aec
rgbrgb(4, 58, 236)
hslhsl(226, 97%, 47%)
oklchoklch(0.472 0.264 264.1)
Closest name: C64 Blue (#003aff)Relative luminance 0.0911

Colors that go with #043aec

Charcoal, Crimson and Amber 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 →

#ecb604

#04aeec · #4204ec

#ec043a · #3aec04

Split-complementary

Open in tool →

#ec4204 · #aeec04

#ec04ae · #ecb604 · #04ec42

Contrast

#043aec as textRatioAAAA largeAAAFix
Aaon white
7.44:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #3b68fc as the text (4.57:1)
  • AAA: use #7293fd as the text (7.31:1)
  • AA: or shift the background to #cccccc (4.63:1)
  • AAA: or shift the background to #fafafa (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043aec as the background.

Brands using this color

Fonts for this mood

#043aec reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043aec
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 #043aec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043aec-9ca1c4-df774e-221f2d-e9eff1?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