I have one more solution. If anybody uses AngularJs : http://jsfiddle.net/ec9gn/30/
<div ng-controller='ctrl'>
<img ng-mouseover="img='eb00eb'" ng-mouseleave="img='000'"
ng-src='http://dummyimage.com/100x100/{{img}}/fff' />
</div>
The Javascript :
function ctrl($scope){
$scope.img= '000';
}
No CSS ^^.