Color

#3142fc

#3142fc
hex#3142fc
rgbrgb(49, 66, 252)
hslhsl(235, 97%, 59%)
oklchoklch(0.511 0.268 268.8)
Closest name: C64 Blue (#003aff)Relative luminance 0.1158

Colors that go with #3142fc

Charcoal, Crimson and Sea Green 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 →

#fceb31

#31a7fc · #8631fc

#fc3142 · #42fc31

Split-complementary

Open in tool →

#fc8631 · #a7fc31

#fc31a7 · #fceb31 · #31fc86

Contrast

#3142fc as textRatioAAAA largeAAAFix
Aaon white
6.33:1passpassfail
  • AAA: use #2234fc as the text (7.08:1)
Aaon black
3.32:1failpassfail
  • AA: use #5462fc as the text (4.53:1)
  • AAA: use #818cfd as the text (7.1:1)
  • AA: or shift the background to #dbdbdb (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3142fc as the background.

Brands using this color

Fonts for this mood

#3142fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3142fc
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 #3142fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3142fc-9e9cc4-df8d4e-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