HEX CODES
#DEE1E4
#D0D5D9
#ABAEAF
#888B8D
#F1F2F6
#EBEFF1
#B7B9BB
#989B9D
#767978
#3C403F
#6C6E6D
#2D302F
#A4AE82
#7E8C4D
#898E74
#565E38
#D2C8BE
#BFB1A3
#A49E98
#7D756C

Original image from Charles Deluvio

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