I'm trying to get a rack with white support. So I went into the visualizations tab of the storage system and I changed all the colors to white (which by the way is a pain because you have to click every line independently). But that didn't work it stayed gray. Then I changed the underlying RackTextures.png file and changed all the gray colors to white but even that doesn't work. Some parts become white but the supports are still gray:
What or how should I change it such that I have white supports lilke this: