CSS Webkit Transition - Fade out slowly than Fade in

Question

This is what I have:

.box{
    background:#FFF;
    -webkit-transition: background 0.5s;
}

.box:hover{
    background:#000;
}

But this appends to both onmouseover and onmouseout actions, but isn't there a way to control them? Something like:

-wekbkit-transition-IN: background 1s;
-webkit-transition-OUT: background 10s;

Answer 1

Just redifine your transition in the over pseudo element.

.box{
    background: white;
    -webkit-transition: background 5s;
}
.box:hover{
    background: olive;
    -webkit-transition: background 1s;
}

Look my http://jsfiddle.net/DoubleYo/nY8U8/

Answer 2

Either use an animation (only in webkit currently), or use JS to add and remove the properties, they will still animate.