I never had Sacred Gold. Rather, I bought Sacred when it came out, and Underworld the same. Apparently Sacred Gold has something that the original and expansion didn't have separately, gold and blue and red coloured tiled in the shops. I understand the red ones are for different character classes and thus unavailable to me, but what about the gold and blue ones? Does gold equate to "better than what you have equipped" and blue "equal to or less than"?
Red background - you understood right, they're for other character classes.
Gold background - you don't have enough gold to buy the item.
Blue background - you can buy the item.
Thanks. That's the answer I was looking for.
I was asking about the coloured TILES, that's one "T", as in the squares the items are framed in within the shops, but not within my inventory. I'm familiar with the colour scheme for the TITLES of items.