Color

#6367cf

#6367cf
hex#6367cf
rgbrgb(99, 103, 207)
hslhsl(238, 53%, 60%)
oklchoklch(0.563 0.157 278.4)
Closest name: slateblue (#6a5acd)Relative luminance 0.1686

Colors that go with #6367cf

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 →

#cfcb63

#639dcf · #9563cf

#cf6367 · #67cf63

Split-complementary

Open in tool →

#cf9563 · #9dcf63

#cf639d · #cfcb63 · #63cf95

Contrast

#6367cf as textRatioAAAA largeAAAFix
Aaon white
4.8:1passpassfail
  • AAA: use #4448c5 as the text (7.05:1)
Aaon black
4.37:1failpassfail
  • AA: use #676ad0 as the text (4.55:1)
  • AAA: use #8e90dc as the text (7.17:1)
  • AA: or shift the background to #fafafa (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6367cf as the background.

Brands using this color

Fonts for this mood

#6367cf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6367cf
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 #6367cf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6367cf-9f9cc4-df944e-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