This is nothing new to all you CSS Ninjas. Here we will take a look at background opacity. I will show you how I achieved the look that you see if you click the demo link below.
For the opacity effect I used rgba. The a is for alpha.
191, 121, 0, 0.2 is the setting that you adjust for the amount of opacity you want to achieve.
background: rgba(191, 121, 0, 1.0);
background: rgba(191, 121, 0, 1.0); Opacity set to 1.0
background: rgba(191, 121, 0, 0.5); Opacity set to 0.5
background: rgba(191, 121, 0, 0.1); Opacity set to 0.1
The other way is using just rgb with a opacity: 0.5;. So the css would look like this.
background: rgb(191, 121, 0); opacity: 0.5;
To get the desired look just change the opacity:0.5; like we did above. Works the same way.
If you want to play around with some CSS3 check out this site! css3generator.com