HEX CODES
#676464
#262121
#636161
#201D1D
#F6F3EC
#F2EFE4
#BBB9B5
#9D9B94
#F5DCAB
#F2CD88
#BAAA8D
#9D865C
#E4BD9B
#D9A171
#AF9783
#8D6B4E
#9D897F
#735748
#847871
#4F3E35

Original image from Johannes Plenio

Five colors with tint, shade, and tone of each for added inspiration. Includes HTML/HEX codes.