Color

#503f5f

#503f5f
hex#503f5f
rgbrgb(80, 63, 95)
hslhsl(272, 20%, 31%)
oklchoklch(0.399 0.057 308.3)
Closest name: Haunted Candelabra (#57446a)Relative luminance 0.0609

Colors that go with #503f5f

Champagne, Copper 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 →

#4e5f3f

#403f5f · #5f3f5e

#5f503f · #3f5f50

Split-complementary

Open in tool →

#5e5f3f · #3f5f40

#5f403f · #4e5f3f · #3f5e5f

Contrast

#503f5f as textRatioAAAA largeAAAFix
Aaon white
9.47:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #866c9d as the text (4.65:1)
  • AAA: use #a28eb4 as the text (7.06:1)
  • AA: or shift the background to #b3b3b3 (4.52:1)
  • AAA: or shift the background to #dedede (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #503f5f 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 #503f5f
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 #503f5f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/503f5f-b69cc4-c5cb62-2d1f2d-eae9f1?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