Color

#503b68

#503b68
hex#503b68
rgbrgb(80, 59, 104)
hslhsl(268, 28%, 32%)
oklchoklch(0.396 0.078 304.6)
Closest name: Long Passionate Night (#5b365e)Relative luminance 0.0583

Colors that go with #503b68

Copper, Crimson and Denim 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 →

#53683b

#3b3c68 · #673b68

#68503b · #3b6850

Split-complementary

Open in tool →

#68673b · #3c683b

#683b3c · #53683b · #3b6867

Contrast

#503b68 as textRatioAAAA largeAAAFix
Aaon white
9.69:1passpasspassPasses AAA — no fix needed.
Aaon black
2.17:1failfailfail
  • AA: use #8869ab as the text (4.66:1)
  • AAA: use #a48dbf as the text (7.14:1)
  • AA: or shift the background to #b3b3b3 (4.62:1)
  • AAA: or shift the background to #dbdbdb (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #503b68 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #503b68
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 #503b68 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/503b68-b39cc4-dfdc4e-2c1f2d-e9eaf1?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