Color

#660dd3

#660dd3
hex#660dd3
rgbrgb(102, 13, 211)
hslhsl(267, 88%, 44%)
oklchoklch(0.461 0.25 292.5)
Closest name: Blurple (#5539cc)Relative luminance 0.0782

Colors that go with #660dd3

Olive Green, Teal and Forest Green 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.

Real palettes that use #660dd3

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#7ad30d

#0d17d3 · #c90dd3

#d3660d · #0dd366

Split-complementary

Open in tool →

#d3c90d · #17d30d

#d30d17 · #7ad30d · #0dd3c9

Contrast

#660dd3 as textRatioAAAA largeAAAFix
Aaon white
8.19:1passpasspassPasses AAA — no fix needed.
Aaon black
2.56:1failfailfail
  • AA: use #9649f3 as the text (4.54:1)
  • AAA: use #b47ef7 as the text (7.27:1)
  • AA: or shift the background to #c2c2c2 (4.6:1)
  • AAA: or shift the background to #f0f0f0 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #660dd3 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

#660dd3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660dd3
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 #660dd3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660dd3-b39cc4-dfda4e-2c1f2d-e9eaf1?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