When a user purchased the pre-defined post style, the font style changes, but not the colour. The colour I'm trying to use is #013ADF . The colours work in other items, such as pre-defined username styles etc., just not the post styles.
I'm not sure what you mean. I add the item within the shop admin and choose a colour for the style, but the colour doesn't show. Why would I have to edit any files?
Hmm... To debug this further I'll need an FTP account and a forum account for a person who has purchased this item (doesn't matter if it's admin or not)