RGBa Browser Support | CSS-TricksThis article was originally published on February 2, 2009 and is now being updated to clarify the concept and update the information for modern browsers. RGBa is a way to declare a color in CSS that includes alpha transparency support. It looks like this: div { background: rgba(200, 54, 54, 0.5); } This allows us to fill areas with transparent color; the first thee numbers representing the color i
