HEX CODES
#6D727A
#2A313E
#66686E
#20232C
#D7E7F6
#C5DDF2
#A8B3BC
#81909E
#E5DDD8
#DACFC8
#B1ADA8
#8E8883
#D39E82
#C0754A
#A68573
#7E4E33
#8C7373
#593333
#796A6A
#3D2525

Original image from Marc Mueller

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