does transparent color in css creates issue of browser compability ? like ff, opera, ie ? or all the browsers understand the css transparent colors ?
Some older versions of firefox and safari would require special css too: -webkit-opacity:0.5; -moz-opacity:0.5;
Can you define more clearly what you MEAN by transparent color... background-color:transparent; Works fine in all browsers; heck it's the default state of most elements since it's an alias to none. palette transparency on a .gif image or a .png - works 100% flawless since IE4. This is where a single color in the palette is chosen to be 100% transparent when rendered in the browser... believe it or not you can even make 24 bit color depth .png that use palette transparency, though few image creation softwares support doing it properly. 8 bit alpha channel .png transparency - works in all modern browsers including IE7, requires javascript assist to work in 6 - fat, bloated, slow - no real reason to be using them in the first place apart from making the site fatter than it needs to be. Interestingly there's a rarely used version that uses a 8 bit palette with a 8 bit alpha for a 16 bit total 'per pixel' size, but that's used even less than the 24 bit palletized transparency. Opacity - works back to IE5 using the proprietary non-standard "filter" property, works in Mozilla and Webkit browsers using their PROPRIETARY non-standard testing properties (the -webkit and -moz canadianguy mentioned)- Opera supports the actual CSS standard for doing it. So... Just exactly which 'transparency' were you referring to?