Color

#4b1ef1

#4b1ef1
hex#4b1ef1
rgbrgb(75, 30, 241)
hslhsl(253, 88%, 53%)
oklchoklch(0.477 0.275 277.7)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0878

Colors that go with #4b1ef1

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 →

#c3f11e

#1e59f1 · #b51ef1

#f14b1e · #1ef14b

Split-complementary

Open in tool →

#f1b51e · #59f11e

#f11e59 · #c3f11e · #1ef1b5

Contrast

#4b1ef1 as textRatioAAAA largeAAAFix
Aaon white
7.62:1passpasspassPasses AAA — no fix needed.
Aaon black
2.76:1failfailfail
  • AA: use #7d5cf5 as the text (4.72:1)
  • AAA: use #9f87f7 as the text (7.28:1)
  • AA: or shift the background to #c7c7c7 (4.51:1)
  • AAA: or shift the background to #f7f7f7 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4b1ef1 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

#4b1ef1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4b1ef1
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 #4b1ef1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b1ef1-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