Color

#583a6e

#583a6e
hex#583a6e
rgbrgb(88, 58, 110)
hslhsl(275, 31%, 33%)
oklchoklch(0.406 0.091 309.5)
Closest name: Heartless (#623b70)Relative luminance 0.0623

Colors that go with #583a6e

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 →

#506e3a

#3e3a6e · #6e3a6a

#6e583a · #3a6e58

Split-complementary

Open in tool →

#6a6e3a · #3a6e3e

#6e3e3a · #506e3a · #3a6a6e

Contrast

#583a6e as textRatioAAAA largeAAAFix
Aaon white
9.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.25:1failfailfail
  • AA: use #9065ae as the text (4.66:1)
  • AAA: use #aa8ac1 as the text (7.11:1)
  • AA: or shift the background to #b5b5b5 (4.56:1)
  • AAA: or shift the background to #e0e0e0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #583a6e 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 #583a6e
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 #583a6e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/583a6e-b89cc4-c0cb62-2d1f2d-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