I imagine slugs can be all different colors although tan is the color I see around my parts.

Sevin is overkill for slugs. Any iron phosphate bait is deadly effective against slugs and snails while harmless to the plants, soil and other insects. Sluggo is a popular name brand, but there are others. Make sure iron phosphate is the active ingredient. The others are more toxic to other things and don't last long once wet. The iron phosphate baits remain effective even after rain.

Yeah slugs can be black and I agree that Sevin is way over-kill. All you have to do is sprinkle some table salt on him.

Dave

I have seen brown slugs in SE TX, gray ones in the San Antonio area, and giant!! black ones in Norway. So, I guess they come in all shapes, sizes, and colors.

Beer worked well for me with the gray ones. It doesn't work for everyone. I prefer a straight sided container filled about half way with beer. They climb in and can't get out. If you use a bowl with slanted sides they can often climb out.