There are 2 problems in Cubase 10 with the color selected in preferences.
PROBLEM 1 - Colors are not saved with the presets of preferences.
I mean that:
step 1- you select green faders and save all preferences in one preset called “pref1”
step 2 - you change color of faders to blue
step 3 - you select preset “pref1” to go back to the green faders
step 4 - faders are still red
PROBLEM 2 - Colors disappear. When I was changing the colors and saving presets,the colors of all faders and channels, etc. turns transparent. Then the faders of mix console have no color, only the edge are in grey color. This problem with transparecncy has ocurred 2 times to me.