Color

#6365bb

#6365bb
hex#6365bb
rgbrgb(99, 101, 187)
hslhsl(239, 39%, 56%)
oklchoklch(0.546 0.132 280.1)
Closest name: Bellflower (#5d66aa)Relative luminance 0.1555

Colors that go with #6365bb

Charcoal, Amber and 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 →

#bbb963

#6390bb · #8d63bb

#bb6365 · #65bb63

Split-complementary

Open in tool →

#bb8d63 · #90bb63

#bb6390 · #bbb963 · #63bb8d

Contrast

#6365bb as textRatioAAAA largeAAAFix
Aaon white
5.11:1passpassfail
  • AAA: use #4b4caa as the text (7.21:1)
Aaon black
4.11:1failpassfail
  • AA: use #6a6cbe as the text (4.5:1)
  • AAA: use #9192cf as the text (7.22:1)
  • AA: or shift the background to #f2f2f2 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6365bb as the background.

Brands using this color

Fonts for this mood

#6365bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6365bb
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 #6365bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6365bb-a09cc4-df964e-251f2d-e9edf1?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