staining colonies on filters

[fogel at BIOVX1.BIOLOGY.UCLA.EDU]

Dear Yeast netters,

Does anyone out there know of a method to stain yeast colonies
on nylon filters?  I would like to make them a different color
from the white background to make more accurate counts.  Any
sort of stain that can be used under visible light would be
perfect.  Thanks!

Gary Fogel
Dept. of Biology, UCLA
Los Angeles, CA 90095-1606
(310) 206-7809