For a static list you could do it like this:
browser http://eq2ref.com/abilities/ - not yet updated to T8
and
browser http://www.eq2alchemy.com/potions-poisons.html
Otherwise this sounds like something for the InfoCenter, not sure if poisons are currently on there, spells are but without previous level info.
Apart from that I like the idea of the auto-coloring based on level. Maybe I'll mod that one of these days. I just don't like the idea of building up the database for this... (read: the amount of work to do for that)