Color

#3c5bc3

#3c5bc3
hex#3c5bc3
rgbrgb(60, 91, 195)
hslhsl(226, 53%, 50%)
oklchoklch(0.507 0.166 267.6)
Closest name: Denim (#1560bd)Relative luminance 0.1238

Colors that go with #3c5bc3

Charcoal, Sea Green 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 →

#c3a43c

#3c9fc3 · #603cc3

#c33c5b · #5bc33c

Split-complementary

Open in tool →

#c3603c · #9fc33c

#c33c9f · #c3a43c · #3cc360

Contrast

#3c5bc3 as textRatioAAAA largeAAAFix
Aaon white
6.04:1passpassfail
  • AAA: use #3652b0 as the text (7.02:1)
Aaon black
3.48:1failpassfail
  • AA: use #5772cb as the text (4.67:1)
  • AAA: use #7e93d7 as the text (7.04:1)
  • AA: or shift the background to #e0e0e0 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3c5bc3 as the background.

Brands using this color

Fonts for this mood

#3c5bc3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3c5bc3
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 #3c5bc3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3c5bc3-9ca1c4-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