A selection of greys and near-greys.
es platinum 16
grayscale02
grayscale02a
grayscale10
grey g2 3
GreyOClock
Greys 09
ib12
platinum palladium 01
power 0.50
pseudogrey
RdGy 11
rock
selenium brown 01
silver 01
stripes six
See also: Thomas Lotze, Eric R. Jeschke, Michele Albert, ElvenSword.