Anonymous
soap and water and a scrub brush and go at it and get the stain out. The blue, the green, the red leave stains on cement. You may have to chisel out the concrete to get rid of it.
thebax2006
A couple of rain storms rinses it off enough it shouldn't bother you. Don't get anal about it. It's a fricken driveway.
Anonymous
Anti-freeze OCD troll strikes again.