Color

#660b59

#660b59
hex#660b59
rgbrgb(102, 11, 89)
hslhsl(309, 81%, 22%)
oklchoklch(0.355 0.147 335.3)
Closest name: Cosmic Explorer (#551155)Relative luminance 0.0379

Colors that go with #660b59

Sea Green, Cream and Denim 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 →

#0b6618

#460b66 · #660b2a

#58660b · #0b5866

Split-complementary

Open in tool →

#2a660b · #0b6646

#66460b · #0b6618 · #0b2a66

Contrast

#660b59 as textRatioAAAA largeAAAFix
Aaon white
11.95:1passpasspassPasses AAA — no fix needed.
Aaon black
1.76:1failfailfail
  • AA: use #d416b8 as the text (4.61:1)
  • AAA: use #ee59d7 as the text (7.05:1)
  • AA: or shift the background to #a1a1a1 (4.63:1)
  • AAA: or shift the background to #c7c7c7 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #660b59 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

#660b59 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660b59
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 #660b59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660b59-c19fb8-85cb62-2d1f25-eee9f1?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