White’s most often reiterated themes have been lifegain, enchantment kill, protection-from, and sucking. If a card says”Counter target spell”, you could be pretty sure it’s Blue. If it says”pay X life to do something”, it’s probably Black. Is it a creature which produces mana? Most likely it’s a Green elf-type card. Does it blow things up good? Red. What themes are White? White has the lowest incidence of”look at this card and figure out what color it’s from” of any color in Magic. I take that back – chances are if the cards are bad en masse, they are easily White cards.

Thankfully, I’ve got some ideas on how to fix things…