Color

#660b43

#660b43
hex#660b43
rgbrgb(102, 11, 67)
hslhsl(323, 81%, 22%)
oklchoklch(0.344 0.133 349.5)
Closest name: Cosmic Explorer (#551155)Relative luminance 0.0347

Colors that go with #660b43

Crimson, Sea Green and Cream 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 →

#0b662d

#5b0b66 · #660b15

#43660b · #0b4366

Split-complementary

Open in tool →

#15660b · #0b665b

#665b0b · #0b662d · #0b1566

Contrast

#660b43 as textRatioAAAA largeAAAFix
Aaon white
12.4:1passpasspassPasses AAA — no fix needed.
Aaon black
1.69:1failfailfail
  • AA: use #de1792 as the text (4.64:1)
  • AAA: use #ef62b9 as the text (7.12:1)
  • AA: or shift the background to #9c9c9c (4.52:1)
  • AAA: or shift the background to #c4c4c4 (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 #660b43 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

#660b43 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660b43
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 #660b43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660b43-c19fb0-6dcb62-2d1f22-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