Color

#3149fc

#3149fc
hex#3149fc
rgbrgb(49, 73, 252)
hslhsl(233, 97%, 59%)
oklchoklch(0.521 0.261 268.3)
Closest name: C64 Blue (#003aff)Relative luminance 0.1245

Colors that go with #3149fc

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 →

#fce431

#31aefc · #7f31fc

#fc3149 · #49fc31

Split-complementary

Open in tool →

#fc7f31 · #aefc31

#fc31ae · #fce431 · #31fc7f

Contrast

#3149fc as textRatioAAAA largeAAAFix
Aaon white
6.02:1passpassfail
  • AAA: use #1832fb as the text (7.27:1)
Aaon black
3.49:1failpassfail
  • AA: use #4f63fc as the text (4.52:1)
  • AAA: use #8190fd as the text (7.34:1)
  • AA: or shift the background to #e0e0e0 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3149fc as the background.

Brands using this color

Fonts for this mood

#3149fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3149fc
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 #3149fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3149fc-9c9cc4-df884e-241f2d-e9eef1?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