The joke is ink. The shirt is the stage. White is honest and cruel to bad art. Ash and sport grey forgive. Charcoal and brown savana make gold lettering look like a sign, not a clip-art download.
On each product we swap the mockup when you tap a color. First paint should already match the default. If you want to hand the picture to someone else, use Share and copy the image, not a row of dead social icons.
Later draft: color-by-color notes for the Alberta set and the lifestyle set.