Color

#6359cf

#6359cf
hex#6359cf
rgbrgb(99, 89, 207)
hslhsl(245, 55%, 58%)
oklchoklch(0.538 0.176 282.5)
Closest name: slateblue (#6a5acd)Relative luminance 0.143

Colors that go with #6359cf

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 →

#c5cf59

#598acf · #9e59cf

#cf6359 · #59cf63

Split-complementary

Open in tool →

#cf9e59 · #8acf59

#cf598a · #c5cf59 · #59cf9e

Contrast

#6359cf as textRatioAAAA largeAAAFix
Aaon white
5.44:1passpassfail
  • AAA: use #4c41c8 as the text (7.25:1)
Aaon black
3.86:1failpassfail
  • AA: use #7269d3 as the text (4.68:1)
  • AAA: use #938cde as the text (7.05:1)
  • AA: or shift the background to #ebebeb (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 #6359cf 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

#6359cf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6359cf
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 #6359cf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6359cf-a49cc4-dfa54e-261f2d-e9ecf1?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