Jonathan’s webpage really is a wonderful resource if you are attempting to paint Russians. I used to find the subject almost totally impenetrable but with his well-laid out charts I now find it much less daunting.
Jonathan, I hope you don’t mind but I have added a hot link direct to your page: Russian Facings of the Napoleonic Era
Bandit, the details you are looking for are in the first table. The colour for buttons and mitre plates is shown in the first column on the left as the background colour to the names of the regiments.