bbbbbb
73571f
00BBBB
00FF00
FF0000
0080ff
cf8f2b
b7876b
c38baa
FF00FF
a3877b
4f6357
FFFF00
0000FF
ff8000
e30074

processing of player colors:
:'<,'>!perl -pe '$_ = sprintf "\%s\n", unpack "H6", pack "CCC", map { $_ * 15/16 + 255/16 } unpack "CCC", pack "H6", $_'                     
(put 1/16 white on them so other-colored light still affects them a bit)

processing of scoreboard colors:
:'<,'>!perl -pe '$_ = sprintf "\%s\n", unpack "H6", pack "CCC", map { $_ * 0.7 + 0.5 } unpack "CCC", pack "H6", $_'
(made them darker by 30%)

red has been darkened further manually