Color

#0043fa

#0043fa
hex#0043fa
rgbrgb(0, 67, 250)
hslhsl(224, 100%, 49%)
oklchoklch(0.5 0.272 263.6)
Closest name: C64 Blue (#003aff)Relative luminance 0.1092

Colors that go with #0043fa

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 →

#fab700

#00c0fa · #3a00fa

#fa0043 · #43fa00

Split-complementary

Open in tool →

#fa3a00 · #c0fa00

#fa00c0 · #fab700 · #00fa3a

Contrast

#0043fa as textRatioAAAA largeAAAFix
Aaon white
6.6:1passpassfail
  • AAA: use #0040f0 as the text (7.02:1)
Aaon black
3.18:1failpassfail
  • AA: use #3369ff as the text (4.61:1)
  • AAA: use #6b93ff as the text (7.24:1)
  • AA: or shift the background to #d6d6d6 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0043fa as the background.

Brands using this color

Fonts for this mood

#0043fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0043fa
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 #0043fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0043fa-9ca2c4-df724e-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