The syntax of the tcolor command is the same as that of the color command. The atom-spec indicates which atoms (and/or associated labels or surfaces) are to be colored with a texture color rather than a conventional color. The default 2D texture can contain five colors. New textures can be created with the texture new command. Colors can be assigned to textures with the texture map or texture color commands. The "current" texture affected by texture commands and used by tcolor can be changed with texture use.
Example:
texture map 1=red 2=blue 3=yellow 4=gray
tcolor gray
tcolor red @o=
tcolor blue @n=
tcolor yellow @s=