Color

#4100cc

#4100cc
hex#4100cc
rgbrgb(65, 0, 204)
hslhsl(259, 100%, 40%)
oklchoklch(0.412 0.25 279.5)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0548

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8bcc00

#0025cc · #a700cc

#cc4100 · #00cc41

Split-complementary

Open in tool →

#cca700 · #25cc00

#cc0025 · #8bcc00 · #00cca7

Contrast

#4100cc as textRatioAAAA largeAAAFix
Aaon white
10.02:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #854dff as the text (4.5:1)
  • AAA: use #a880ff as the text (7.2:1)
  • AA: or shift the background to #b0b0b0 (4.62:1)
  • AAA: or shift the background to #d9d9d9 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4100cc 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

#4100cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4100cc
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 #4100cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4100cc-ad9cc4-dfc74e-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