Color

#66059e

#66059e
hex#66059e
rgbrgb(102, 5, 158)
hslhsl(278, 94%, 32%)
oklchoklch(0.406 0.206 306.1)
Closest name: Extraviolet (#661188)Relative luminance 0.054

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3d9e05

#19059e · #9e058a

#9e6605 · #059e66

Split-complementary

Open in tool →

#8a9e05 · #059e19

#9e1905 · #3d9e05 · #058a9e

Contrast

#66059e as textRatioAAAA largeAAAFix
Aaon white
10.09:1passpasspassPasses AAA — no fix needed.
Aaon black
2.08:1failfailfail
  • AA: use #af2ff9 as the text (4.6:1)
  • AAA: use #c870fb as the text (7.17:1)
  • AA: or shift the background to #b0b0b0 (4.65:1)
  • AAA: or shift the background to #d9d9d9 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #66059e 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

#66059e reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #66059e
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 #66059e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66059e-ba9cc4-bbcb62-2d1f2c-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