Color

#4b00cc

#4b00cc
hex#4b00cc
rgbrgb(75, 0, 204)
hslhsl(262, 100%, 40%)
oklchoklch(0.421 0.249 283.4)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0586

Colors that go with #4b00cc

Charcoal, Denim and Cobalt Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#81cc00

#001bcc · #b100cc

#cc4b00 · #00cc4b

Split-complementary

Open in tool →

#ccb100 · #1bcc00

#cc001b · #81cc00 · #00ccb1

Contrast

#4b00cc as textRatioAAAA largeAAAFix
Aaon white
9.67:1passpasspassPasses AAA — no fix needed.
Aaon black
2.17:1failfailfail
  • AA: use #8e4dff as the text (4.66:1)
  • AAA: use #ae80ff as the text (7.33:1)
  • AA: or shift the background to #b3b3b3 (4.61:1)
  • AAA: or shift the background to #dedede (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4b00cc 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

#4b00cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4b00cc
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #4b00cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b00cc-af9cc4-dfce4e-2a1f2d-e9eaf1?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