Color

#645a4f

#645a4f
hex#645a4f
rgbrgb(100, 90, 79)
hslhsl(31, 12%, 35%)
oklchoklch(0.474 0.022 69.9)
Closest name: Bark (#5f5854)Relative luminance 0.1059

Colors that go with #645a4f

Charcoal, Cadet Blue and Champagne 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 →

#4f5964

#644f4f · #64644f

#4f645a · #5a4f64

Split-complementary

Open in tool →

#4f6464 · #4f4f64

#4f644f · #4f5964 · #644f64

Contrast

#645a4f as textRatioAAAA largeAAAFix
Aaon white
6.74:1passpassfail
  • AAA: use #61574c as the text (7.06:1)
Aaon black
3.12:1failpassfail
  • AA: use #817365 as the text (4.57:1)
  • AAA: use #a19487 as the text (7.1:1)
  • AA: or shift the background to #d4d4d4 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #645a4f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#645a4f reads as warm, muted, editorial. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #645a4f
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 #645a4f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/645a4f-c4b59c-62c7cb-2d2c1f-f1eae9?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