Color

#3c6cdd

#3c6cdd
hex#3c6cdd
rgbrgb(60, 108, 221)
hslhsl(222, 70%, 55%)
oklchoklch(0.561 0.181 264.1)
Closest name: Royal Blue (#4169e1)Relative luminance 0.1691

Colors that go with #3c6cdd

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 →

#ddac3c

#3cbcdd · #5c3cdd

#dd3c6c · #6cdd3c

Split-complementary

Open in tool →

#dd5c3c · #bcdd3c

#dd3cbc · #ddac3c · #3cdd5c

Contrast

#3c6cdd as textRatioAAAA largeAAAFix
Aaon white
4.79:1passpassfail
  • AAA: use #2251bf as the text (7.01:1)
Aaon black
4.38:1failpassfail
  • AA: use #406fdd as the text (4.54:1)
  • AAA: use #7093e6 as the text (7.01:1)
  • AA: or shift the background to #fafafa (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3c6cdd as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#3c6cdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3c6cdd
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 #3c6cdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3c6cdd-9ca3c4-df6e4e-211f2d-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