Without color; lacking characteristics which give variety. blank (Adjective). Free from writing, printing, or marks; having an empty space to be filled in; as, blank paper; a blank check; a blank ballot. blank (Adjective). Without expression.
Yes they do damage hair. Every time I have tried one ,I wound up looking like a Q-tip or my head looked like cotton. A perm will damage even more and look worse if you have been coloring your hair. There's chance of it looking okay if you don't color your hair.
There are several ways to have colored permed hair. You can perm and color (with a demi-permanent color) the same day. Demi's do not lighten your hair, they can cover the grey, make the same shade or go darker. You can perm and wait 3 days and color your hair. You can perm and color you hair, the same day using permanent color with enzymes.