Color

#660a8a

#660a8a
hex#660a8a
rgbrgb(102, 10, 138)
hslhsl(283, 86%, 29%)
oklchoklch(0.391 0.187 312.6)
Closest name: Extraviolet (#661188)Relative luminance 0.0488

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2e8a0a

#260a8a · #8a0a6e

#8a660a · #0a8a66

Split-complementary

Open in tool →

#6e8a0a · #0a8a26

#8a260a · #2e8a0a · #0a6e8a

Contrast

#660a8a as textRatioAAAA largeAAAFix
Aaon white
10.63:1passpasspassPasses AAA — no fix needed.
Aaon black
1.98:1failfailfail
  • AA: use #b72aef as the text (4.59:1)
  • AAA: use #cd6cf4 as the text (7.05:1)
  • AA: or shift the background to #ababab (4.63:1)
  • AAA: or shift the background to #d4d4d4 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #660a8a 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

#660a8a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660a8a
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #660a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660a8a-bb9fc1-b2cb62-2d1f2b-ebe9f1?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