Color

#3f3fca

#3f3fca
hex#3f3fca
rgbrgb(63, 63, 202)
hslhsl(240, 57%, 52%)
oklchoklch(0.464 0.208 274.7)
Closest name: Blurple (#5539cc)Relative luminance 0.0888

Tints & shades

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

Harmonies

Complementary

Open in tool →

#caca3f

#3f85ca · #853fca

#ca3f3f · #3fca3f

Split-complementary

Open in tool →

#ca853f · #85ca3f

#ca3f85 · #caca3f · #3fca85

Contrast

#3f3fca as textRatioAAAA largeAAAFix
Aaon white
7.57:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #6b6bd6 as the text (4.7:1)
  • AAA: use #8f8fe0 as the text (7.17:1)
  • AA: or shift the background to #c9c9c9 (4.57:1)
  • AAA: or shift the background to #f7f7f7 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f3fca 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

#3f3fca reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f3fca
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 #3f3fca and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f3fca-a19cc4-df994e-251f2d-e9edf1?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