Color

#4015cb

#4015cb
hex#4015cb
rgbrgb(64, 21, 203)
hslhsl(254, 81%, 44%)
oklchoklch(0.42 0.243 278.7)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0594

Colors that go with #4015cb

Charcoal, Cornflower Blue and Crimson 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 →

#a1cb15

#1546cb · #9b15cb

#cb4015 · #15cb40

Split-complementary

Open in tool →

#cb9b15 · #46cb15

#cb1546 · #a1cb15 · #15cb9b

Contrast

#4015cb as textRatioAAAA largeAAAFix
Aaon white
9.6:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #7c59ee as the text (4.52:1)
  • AAA: use #a087f2 as the text (7.24:1)
  • AA: or shift the background to #b3b3b3 (4.58:1)
  • AAA: or shift the background to #dedede (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4015cb 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

#4015cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4015cb
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 #4015cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4015cb-aa9cc4-dfbb4e-291f2d-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