Changes top menu links hover colours

I think it's more beautiful to don't have backgound colour and have a coloured-inverse colour for hovered links in top menu. (background removed from css properties and colour changed to: `yellowgreen`)

Is gold a good colour?
It's also understood by old browsers! :P
and just a question, how old a browser must be to doesn't support rgp instructor?? cuz this one introduced in CSSL2 and I think you mixed rgb and rgba up (rgba is in CSSL3 and may not be supported on some ancient browsers!)