Color

#540ef6

#540ef6
hex#540ef6
rgbrgb(84, 14, 246)
hslhsl(258, 93%, 51%)
oklchoklch(0.482 0.284 280.5)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0885

Colors that go with #540ef6

Charcoal, Cobalt 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 →

#b1f60e

#0e3cf6 · #c80ef6

#f6540e · #0ef654

Split-complementary

Open in tool →

#f6c80e · #3cf60e

#f60e3c · #b1f60e · #0ef6c8

Contrast

#540ef6 as textRatioAAAA largeAAAFix
Aaon white
7.58:1passpasspassPasses AAA — no fix needed.
Aaon black
2.77:1failfailfail
  • AA: use #8553f9 as the text (4.6:1)
  • AAA: use #a884fb as the text (7.36:1)
  • AA: or shift the background to #c9c9c9 (4.58:1)
  • AAA: or shift the background to #f7f7f7 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #540ef6 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

#540ef6 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #540ef6
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 #540ef6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/540ef6-ad9cc4-dfc44e-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