I've a simple question: If I'm not going to use Alpha on RGBA, for some colors, should I use HEX on these colors? Is there something HEX has that RGBA doesn't? Like browser compatibility, for example? Or is it just fine to use RGBA all the time? I find it better, cause if I would want to use Alpha, I could. Thanks in advance.
Both should be compatible with any standards-compliant browser.
Edit: There might be some buggy behavior in IE (suprise!): http://css-tricks.com/ie-background-rgb-bug/