Color

#866ce4

#866ce4
hex#866ce4
rgbrgb(134, 108, 228)
hslhsl(253, 69%, 66%)
oklchoklch(0.614 0.175 290.3)
Closest name: mediumslateblue (#7b68ee)Relative luminance 0.2139

Colors that go with #866ce4

Amber, Blue and Deep Sky 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 →

#cae46c

#6c8ee4 · #c26ce4

#e4866c · #6ce486

Split-complementary

Open in tool →

#e4c26c · #8ee46c

#e46c8e · #cae46c · #6ce4c2

Contrast

#866ce4 as textRatioAAAA largeAAAFix
Aaon white
3.98:1failpassfail
  • AA: use #7c60e2 as the text (4.54:1)
  • AAA: use #5834da as the text (7.2:1)
  • AA: or shift the background to #171717 (4.51:1)
Aaon black
5.28:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #866ce4 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

#866ce4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #866ce4
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 #866ce4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/866ce4-a99cc4-dfb84e-281f2d-e9ebf1?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