Color

#583c68

#583c68
hex#583c68
rgbrgb(88, 60, 104)
hslhsl(278, 27%, 32%)
oklchoklch(0.407 0.079 312.5)
Closest name: Long Passionate Night (#5b365e)Relative luminance 0.0631

Colors that go with #583c68

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 →

#4c683c

#413c68 · #683c62

#68573c · #3c6857

Split-complementary

Open in tool →

#62683c · #3c6841

#68413c · #4c683c · #3c6268

Contrast

#583c68 as textRatioAAAA largeAAAFix
Aaon white
9.29:1passpasspassPasses AAA — no fix needed.
Aaon black
2.26:1failfailfail
  • AA: use #8d64a6 as the text (4.51:1)
  • AAA: use #aa8abc as the text (7.07:1)
  • AA: or shift the background to #b5b5b5 (4.53:1)
  • AAA: or shift the background to #e0e0e0 (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 #583c68 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 #583c68
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 #583c68 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/583c68-ba9cc4-bbcb62-2d1f2c-ebe9f1?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