Color

#3145c4

#3145c4
hex#3145c4
rgbrgb(49, 69, 196)
hslhsl(232, 60%, 48%)
oklchoklch(0.461 0.197 269.7)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0889

Colors that go with #3145c4

Charcoal, Sea Green and Steel 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 →

#c4b031

#318ec4 · #6731c4

#c43145 · #45c431

Split-complementary

Open in tool →

#c46731 · #8ec431

#c4318e · #c4b031 · #31c467

Contrast

#3145c4 as textRatioAAAA largeAAAFix
Aaon white
7.56:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #5c6cd6 as the text (4.57:1)
  • AAA: use #8591e0 as the text (7.12:1)
  • AA: or shift the background to #c9c9c9 (4.56:1)
  • AAA: or shift the background to #f7f7f7 (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 #3145c4 as the background.

Brands using this color

Fonts for this mood

#3145c4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3145c4
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 #3145c4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3145c4-9c9dc4-df864e-231f2d-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