Dark Grey Matte makes small forms easier to distinguish.
Real low sheen needs a physical surface.
Pale type keeps the contrast clean.
Tints
#545454
#656565
#767676
#878787
#989898
#aaaaaa
#bbbbbb
#cccccc
#dddddd
#eeeeee
#ffffff
Shades
#545454
#4c4c4c
#434343
#3b3b3b
#323232
#2a2a2a
#222222
#191919
#111111
#080808
Triadic
#545454
#545454
#545454
Monochromatic
#373737
#454545
#545454
#737373
#909090
Analogous
#545454
#545454
#545454
Complementary
#545454
#545454