Color

#3c5cb4

#3c5cb4
hex#3c5cb4
rgbrgb(60, 92, 180)
hslhsl(224, 50%, 47%)
oklchoklch(0.498 0.144 266.2)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1191

Colors that go with #3c5cb4

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 →

#b4943c

#3c98b4 · #583cb4

#b43c5c · #5cb43c

Split-complementary

Open in tool →

#b4583c · #98b43c

#b43c98 · #b4943c · #3cb458

Contrast

#3c5cb4 as textRatioAAAA largeAAAFix
Aaon white
6.21:1passpassfail
  • AAA: use #3754a4 as the text (7.08:1)
Aaon black
3.38:1failpassfail
  • AA: use #5371c6 as the text (4.55:1)
  • AAA: use #7d94d4 as the text (7.06:1)
  • AA: or shift the background to #dedede (4.62:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3c5cb4 as the background.

Brands using this color

Fonts for this mood

#3c5cb4 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3c5cb4
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 #3c5cb4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3c5cb4-9ca2c4-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