Individual for Google Chrome and some webkit browsers, and Opera in some cases
/* will be red only in google chrome */
@media screen and (-webkit-min-device-pixel-ratio:0) {
#test1{color:red;}
}
/* will be red only in opera and google chrome */
#test2 {
color:green;
-bracket-:hack(;
color:red;
);
}
/* will be red only in google chrome */
#test3{
color:green;
(-bracket-:hack;
color:red;
);
}
/* will be red only in google chrome */
#test4{
color:green;
-bracket-:hack[;
color:red;
];
}