p {
color: blue; All browsers
color:red\9; IE6, 7, 8 only (Has to come before the other IE hacks for inheritance to work)
/color:green; IE6, 7 only (Has to come before the IE6 hack for inheritance to work)
_color:yellow; IE 6 only
}

p, x:-moz-any-link { Firefox only
color:black;
}

Additionally, here’s how to target IE 6 and 7 together:

p {
*color:black;
}