Yellow
This cowboy rushed into to the saloon yelling, "All right, who's the wise guy that painted my horse yellow?"
There was silence in the saloon. 'Fess up if you dare," shouted the cowboy.
With that, the biggest, meanest-looking hombre he had ever seen got up from one of the tables, rested his hands on his gun handles and coolly stated, "I did, whaddaya want to tell me?"
The cowboy looked up and down at this terrifying figure, swallowed hard and replied, "Just thought you'd like know, the first coat's dry!"