Color

#4e21d4

#4e21d4
hex#4e21d4
rgbrgb(78, 33, 212)
hslhsl(255, 73%, 48%)
oklchoklch(0.45 0.243 282)
Closest name: Blurple (#5539cc)Relative luminance 0.0746

Colors that go with #4e21d4

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 →

#a7d421

#214ed4 · #a721d4

#d44e21 · #21d44e

Split-complementary

Open in tool →

#d4a721 · #4ed421

#d4214e · #a7d421 · #21d4a7

Contrast

#4e21d4 as textRatioAAAA largeAAAFix
Aaon white
8.43:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #7e5ce6 as the text (4.56:1)
  • AAA: use #a188ec as the text (7.25:1)
  • AA: or shift the background to #bfbfbf (4.58:1)
  • AAA: or shift the background to #ebebeb (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4e21d4 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

#4e21d4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4e21d4
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 #4e21d4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4e21d4-ab9cc4-dfbd4e-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