Here's a TinEye colour extraction for my Primark photo from
"Primark
and the Spectrum Suckers". Four browns, two greys, and a black.
For comparison, here is the palette for mud †.
† Extracted from
the photograph
at https://commons.wikimedia.org/wiki/File:Dirt_and_Mud_007_-_Mud.jpg,
credited to user 0x0077BE.