Color

#643556

#643556
hex#643556
rgbrgb(100, 53, 86)
hslhsl(318, 31%, 30%)
oklchoklch(0.4 0.081 339.3)
Closest name: Long Passionate Night (#5b365e)Relative luminance 0.0593

Colors that go with #643556

Teal, 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.

Real palettes that use #643556

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#356443

#5b3564 · #64353e

#566435 · #355664

Split-complementary

Open in tool →

#3e6435 · #35645b

#645b35 · #356443 · #353e64

Contrast

#643556 as textRatioAAAA largeAAAFix
Aaon white
9.61:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #a95b92 as the text (4.6:1)
  • AAA: use #be83ac as the text (7.03:1)
  • AA: or shift the background to #b3b3b3 (4.58:1)
  • AAA: or shift the background to #dedede (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #643556 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#643556 reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #643556
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 #643556 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/643556-c19fb3-75cb62-2d1f23-f0e9f1?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