Color

#660558

#660558
hex#660558
rgbrgb(102, 5, 88)
hslhsl(309, 91%, 21%)
oklchoklch(0.352 0.151 335.8)
Closest name: Cosmic Explorer (#551155)Relative luminance 0.0364

Tints & shades

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

Harmonies

Complementary

Open in tool →

#056613

#440566 · #660527

#586605 · #055866

Split-complementary

Open in tool →

#276605 · #056644

#664405 · #056613 · #052766

Contrast

#660558 as textRatioAAAA largeAAAFix
Aaon white
12.16:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #d60ab8 as the text (4.59:1)
  • AAA: use #f74bdd as the text (7.01:1)
  • AA: or shift the background to #9e9e9e (4.54:1)
  • AAA: or shift the background to #c7c7c7 (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 #660558 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

#660558 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660558
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 #660558 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660558-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