I dont think they are coloring those bulls much when fitting. A lot of it is as was already stated, regardless if colored or not, or what natural color, vibrance and tone of color is much different in one that is freshly washed and clipped on and fit, versus one that is just standing there. Plus when you see the pictures, often times its the lighting, plus the fact that they often photo shop the background into the picture, so that changes the appearance of the natural color as well. And a lot of times when we see these bulls in person, unless your lucky enough to be in Denver or there on picture day, then they are just in their working clothes.