Color

#660fb8

#660fb8
hex#660fb8
rgbrgb(102, 15, 184)
hslhsl(271, 85%, 39%)
oklchoklch(0.435 0.225 298.4)
Closest name: Fuchsia Nebula (#7722aa)Relative luminance 0.0663

Tints & shades

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

Harmonies

Complementary

Open in tool →

#61b80f

#120fb8 · #b80fb5

#b8660f · #0fb866

Split-complementary

Open in tool →

#b5b80f · #0fb812

#b8120f · #61b80f · #0fb5b8

Contrast

#660fb8 as textRatioAAAA largeAAAFix
Aaon white
9.03:1passpasspassPasses AAA — no fix needed.
Aaon black
2.33:1failfailfail
  • AA: use #9e47f0 as the text (4.61:1)
  • AAA: use #ba7bf4 as the text (7.23:1)
  • AA: or shift the background to #b8b8b8 (4.55:1)
  • AAA: or shift the background to #e3e3e3 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #660fb8 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

#660fb8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #660fb8
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 #660fb8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/660fb8-b59cc4-c7cb62-2c1f2d-eae9f1?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