Red is used for dampers only and the alternative, as stated above is Silkolene Pro RSF 10wt – however, you don’t want to be using this for lubrication in the lowers as it’s not very smooth (high Viscosity Index which means the oil remains stable at higher temps gives the downside of poorer lubricity).
Green is the one you want for the lowers – and again, as stated above it’s Torco (labeled by them as rear shock oil as I recall). However, Torco is hard to come by in the UK by my experience the genuine Fox Green oil works out just as cheap.
You can of course use other oils such as Stendec, Rock Oil etc etc.