I agree with Kevin.....the boots appear to be a light tan. This does not exclude the concept of having white boots; however, if one would go that route, weathering must be a necessity in order to show different tones. I also agree with Tony.....considering the main feature on the Kashyyyk armor is the camo pattern which definately is not white, why would there be white boots? No matter what world or universe you would be in, the reality is white would almost instantly be coated with some sort of mud, debris, or planetary material casting the appearance to a different shade of brown or tan. This also does not include the concept of any fighting which we all know from EPIII, the Kashyyyk did plenty of with the Wookies.
I was around when several debates took place. I watched and listened to the different views on this subject then and am doing again now. This was definately one of them. I studied the various film prints and high resolution pics which were available in 2010 when I constructed my costume. I still believe light tan is the way to go.
Just my 2 Galactic Credits.