Color

#513cdd

#513cdd
hex#513cdd
rgbrgb(81, 60, 221)
hslhsl(248, 70%, 55%)
oklchoklch(0.491 0.23 279.6)
Closest name: Blurple (#5539cc)Relative luminance 0.102

Colors that go with #513cdd

Charcoal, Sea Green and Amber 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 →

#c7dd3c

#3c77dd · #a23cdd

#dd513c · #3cdd51

Split-complementary

Open in tool →

#dda23c · #77dd3c

#dd3c77 · #c7dd3c · #3cdda2

Contrast

#513cdd as textRatioAAAA largeAAAFix
Aaon white
6.91:1passpassfail
  • AAA: use #4d38dc as the text (7.2:1)
Aaon black
3.04:1failpassfail
  • AA: use #7463e3 as the text (4.64:1)
  • AAA: use #978aea as the text (7.14:1)
  • AA: or shift the background to #d1d1d1 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #513cdd 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

#513cdd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #513cdd
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 #513cdd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/513cdd-a69cc4-dfac4e-271f2d-e9ecf1?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