Color

#6374de

#6374de
hex#6374de
rgbrgb(99, 116, 222)
hslhsl(232, 65%, 63%)
oklchoklch(0.598 0.161 273.7)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2042

Colors that go with #6374de

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 →

#dece63

#63b1de · #9063de

#de6374 · #74de63

Split-complementary

Open in tool →

#de9063 · #b1de63

#de63b1 · #dece63 · #63de90

Contrast

#6374de as textRatioAAAA largeAAAFix
Aaon white
4.13:1failpassfail
  • AA: use #5b6cdc as the text (4.54:1)
  • AAA: use #3146d3 as the text (7.13:1)
  • AA: or shift the background to #121212 (4.53:1)
Aaon black
5.08:1passpassfail
  • AAA: use #8592e5 as the text (7.24:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6374de as the background.

Brands using this color

Fonts for this mood

#6374de reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6374de
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 #6374de and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6374de-9c9dc4-df864e-231f2d-e9eef1?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