Color

#6503ce

#6503ce
hex#6503ce
rgbrgb(101, 3, 206)
hslhsl(269, 97%, 41%)
oklchoklch(0.451 0.249 293.4)
Closest name: Blurple (#5539cc)Relative luminance 0.0729

Colors that go with #6503ce

Olive Green, Charcoal and Royal 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 →

#6cce03

#0307ce · #cb03ce

#ce6503 · #03ce65

Split-complementary

Open in tool →

#cecb03 · #07ce03

#ce0307 · #6cce03 · #03cecb

Contrast

#6503ce as textRatioAAAA largeAAAFix
Aaon white
8.54:1passpasspassPasses AAA — no fix needed.
Aaon black
2.46:1failfailfail
  • AA: use #9b40fc as the text (4.53:1)
  • AAA: use #b877fd as the text (7.1:1)
  • AA: or shift the background to #bdbdbd (4.55:1)
  • AAA: or shift the background to #ebebeb (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 #6503ce 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

#6503ce reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6503ce
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 #6503ce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6503ce-b49cc4-cbcb62-2c1f2d-e9e9f1?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