Color

#643f5a

#643f5a
hex#643f5a
rgbrgb(100, 63, 90)
hslhsl(316, 23%, 32%)
oklchoklch(0.42 0.065 337.2)
Closest name: Grape Fizz (#64435f)Relative luminance 0.07

Colors that go with #643f5a

Copper, Powder Blue and Sage Green 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 #643f5a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f6449

#5c3f64 · #643f48

#5a643f · #3f5a64

Split-complementary

Open in tool →

#48643f · #3f645c

#645c3f · #3f6449 · #3f4864

Contrast

#643f5a as textRatioAAAA largeAAAFix
Aaon white
8.75:1passpasspassPasses AAA — no fix needed.
Aaon black
2.4:1failfailfail
  • AA: use #9d628d as the text (4.57:1)
  • AAA: use #b488a9 as the text (7.04:1)
  • AA: or shift the background to #bababa (4.51:1)
  • AAA: or shift the background to #e6e6e6 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #643f5a as the background.

Brands using this color

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

Fonts for this mood

#643f5a reads as warm, muted, editorial. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #643f5a
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 #643f5a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/643f5a-c19fb4-79cb62-2d1f23-efe9f1?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