Color

#866cf9

#866cf9
hex#866cf9
rgbrgb(134, 108, 249)
hslhsl(251, 92%, 70%)
oklchoklch(0.628 0.202 287.6)
Closest name: mediumslateblue (#7b68ee)Relative luminance 0.2263

Colors that go with #866cf9

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 →

#dff96c

#6c99f9 · #cc6cf9

#f9866c · #6cf986

Split-complementary

Open in tool →

#f9cc6c · #99f96c

#f96c99 · #dff96c · #6cf9cc

Contrast

#866cf9 as textRatioAAAA largeAAAFix
Aaon white
3.8:1failpassfail
  • AA: use #7659f8 as the text (4.61:1)
  • AAA: use #4d28f6 as the text (7.12:1)
  • AA: or shift the background to #1a1a1a (4.58:1)
Aaon black
5.53:1passpassfail
  • AAA: use #9a85fa as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #866cf9 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

#866cf9 reads as cool, vivid, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #866cf9
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 #866cf9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/866cf9-a89cc4-dfb34e-281f2d-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