CSS and opacity

I am using this for my background:

background: rgba(127,127,127,0.25)

This isn't valid CSS and I am wanting to use:

background: rgb(127,127,127);
opacity: 0.25

The problem with using the second one is that the opacity also effecting everything inside the DIV container.

Does anyone have a solution for just getting the background at 25% opacity, whilst being CSS compliant (no transparent image as background please :P)?

Does anyone have a solution for just getting the background at 25% opacity, whilst being CSS compliant (no transparent image as background please :P)?Change the validation profile (under "More Options") to CSS3 if using the W3C's validator. The default profile is CSS2.1.

Your RGBA code is valid CSS and defined in CSS3 Color.