Color

#4017d3

#4017d3
hex#4017d3
rgbrgb(64, 23, 211)
hslhsl(253, 80%, 46%)
oklchoklch(0.43 0.25 277.6)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0641

Colors that go with #4017d3

Charcoal, Cobalt Blue and Cornflower 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 →

#aad317

#174dd3 · #9e17d3

#d34017 · #17d340

Split-complementary

Open in tool →

#d39e17 · #4dd317

#d3174d · #aad317 · #17d39e

Contrast

#4017d3 as textRatioAAAA largeAAAFix
Aaon white
9.21:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #7a5aed as the text (4.51:1)
  • AAA: use #9f88f2 as the text (7.28:1)
  • AA: or shift the background to #b8b8b8 (4.64:1)
  • AAA: or shift the background to #e3e3e3 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4017d3 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

#4017d3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4017d3
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 #4017d3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4017d3-a99cc4-dfb84e-281f2d-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