Color Sets were just that - sets of white figures and accessories with pens to color them. There were a number of animals released in those sets, many before ever appearing in typical colors. Most were white, but the giraffe was always tan-yellow and the tiger was in orange in only one set - the 3145 Zoo.
The Color animals are shown in the thumbnails below. Click on them to go to the animal's page.
The Gnu or Water Buffalo was also in the 3145 Zoo and was shown colored on the box. It is the same as the previously released version.