A question about Thomism

[LinuxGal]

A T-shirt is ontologically prior to its color. If its color stopped existing (e.g. if you dyed it) the T-shirt would still exist. But if the T-shirt stopped existing (e.g. if you burned it) its color would also stop existing.

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.