That is a fine specimen! With all the stickers intact, such as the Tange Chromo on the post, I'd assume that is original, the decals seem original too. That fork is a fairly uncommon one, it is an oil damped air fork made by RockShock, it actually worked well (especially considering era) , and if it still is working well, I'd say don't take it apart, seals and wipers are not readily available. Here is a link to a few catalogues, hope you can find your color answer there.