A question about Thomism

[LinuxGal]

Yet red is prior to the t-shirt. When you first see the t-shirt, you judge it to have the attribute of red on the basis of having previously seen other red things.

We're talking about a quality of the shirt. Not the existence of red itself. 

You've elevated a property to a form to demonstrate a dependency relationship.  If "red" and "shirt" are not in the same metaphysical class then speaking of one or the other as having priority is incoherent. It's like claiming an actual god is greater than the mere idea of a god.