Color

#660b44

#660b44
hex#660b44
rgbrgb(102, 11, 68)
hslhsl(322, 81%, 22%)
oklchoklch(0.344 0.133 348.8)
Closest name: Cosmic Explorer (#551155)Relative luminance 0.0348

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0b662c

#590b66 · #660b17

#44660b · #0b4466

Split-complementary

Open in tool →

#17660b · #0b6659

#66590b · #0b662c · #0b1766

Contrast

#660b44 as textRatioAAAA largeAAAFix
Aaon white
12.38:1passpasspassPasses AAA — no fix needed.
Aaon black
1.7:1failfailfail
  • AA: use #de1795 as the text (4.66:1)
  • AAA: use #ef62bb as the text (7.13:1)
  • AA: or shift the background to #9c9c9c (4.51:1)
  • AAA: or shift the background to #c4c4c4 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #660b44 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

#660b44 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660b44
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 #660b44 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660b44-c19fb1-6ecb62-2d1f22-f0e9f1?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