HEX CODES
#BFBFC0
#A4A4A6
#999999
#6D6D6E
#E3E3E4
#D7D7D9
#AFAFB0
#8C8C8D
#AAC0A0
#86A677
#8B9985
#5A6E51
#E48975
#D9573A
#AF786B
#8D3E2C
#F5B7B7
#F29999
#BA9494
#9D6666

Original image from Alexandra Gorn

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