Color Palettes derived from some of the images…
1
#667766
#225577
#aa8866
#cccccc
#997755
2
#556666
#bb5533
#bb9955
#ddcccc
#4488aa
3
#333344
#ee0000
#ffaa22
#ddbb99
#558899
4
#697170
#253879
#9e8a6b
#aaaec9
#86686d