What browsers support Alpha channel in colors?

Question

Since I'm always sticking to CSS 2, it was a (pleasant) surprise for me today to find out that CSS 3 supports alpha channels in colors. That allows for a nice range of effects. But - which browsers (and from what version) support this? Is it safe to use this today, or are we better off by still making a 1x1px png image and adding the IE6-filter-hack?

Answer 1

Here is an article detailing support for that in various browsers.

You probably should do this with a PNG image and fall back to something reasonable for IE 6. And you don't want that PNG image to be 1×1 px² large because tiling such very small images is painfully slow in some rendering engines. Making the image 100×100 px² doesn't cost you anything :-)