Color

#573b6d

#573b6d
hex#573b6d
rgbrgb(87, 59, 109)
hslhsl(274, 30%, 33%)
oklchoklch(0.406 0.087 308.8)
Closest name: Heartless (#623b70)Relative luminance 0.0626

Colors that go with #573b6d

Crimson, Denim and Midnight 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 →

#516d3b

#3e3b6d · #6d3b6a

#6d583b · #3b6d58

Split-complementary

Open in tool →

#6a6d3b · #3b6d3e

#6d3e3b · #516d3b · #3b6a6d

Contrast

#573b6d as textRatioAAAA largeAAAFix
Aaon white
9.33:1passpasspassPasses AAA — no fix needed.
Aaon black
2.25:1failfailfail
  • AA: use #8e67ad as the text (4.69:1)
  • AAA: use #a98bc1 as the text (7.15:1)
  • AA: or shift the background to #b5b5b5 (4.55:1)
  • AAA: or shift the background to #e0e0e0 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #573b6d 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 #573b6d
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 #573b6d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/573b6d-b79cc4-c2cb62-2d1f2d-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