Color

#6643ad

#6643ad
hex#6643ad
rgbrgb(102, 67, 173)
hslhsl(260, 44%, 47%)
oklchoklch(0.479 0.162 294.7)
Closest name: rebeccapurple (#663399)Relative luminance 0.0986

Tints & shades

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

Harmonies

Complementary

Open in tool →

#89ad43

#4355ad · #9b43ad

#ad6643 · #43ad66

Split-complementary

Open in tool →

#ad9b43 · #55ad43

#ad4355 · #89ad43 · #43ad9b

Contrast

#6643ad as textRatioAAAA largeAAAFix
Aaon white
7.07:1passpasspassPasses AAA — no fix needed.
Aaon black
2.97:1failfailfail
  • AA: use #8465c3 as the text (4.63:1)
  • AAA: use #a189d1 as the text (7.01:1)
  • AA: or shift the background to #cfcfcf (4.54:1)
  • AAA: or shift the background to #ffffff (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 #6643ad 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

#6643ad reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6643ad
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 #6643ad and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6643ad-ae9cc4-dfc94e-2a1f2d-e9ebf1?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