I guess this is so simple may be why it is so hard to find info on this?
Figured it out by having ChatGPT create a python script to create an array of planes, and give the vertex colors of each plane evenly distributed values between 0-1. I also had to output the vertex colors as sRGB in Blender instead of Linear Color, which seemed odd to me as I would think sRGB wouldchange the values of the vertex colors.
Blender Export with sRGB Vertex Colors, then in Material, multiply vertex channel by 255 and append this value to the texcoord and this goes ito the UV input for the texture array
