willybfriendly - 10:45 pm on Apr 14, 2011 (gmt 0)
Original file names? Like "logo.png", "header_1.jpg" or"nav-bkgrnd.gif"?
Google is far, far beyond that, just as they most assuredly do not give a boost for <img src="cheap-airline-tickets.com" alt="buy cheap airline tickets" title="cheapest, most inexpensive airline tickets for sale on-line" />
I would say the same about background colors.
It is what you are not seeing that is making the difference. You are chasing red herrings...