.grayscale {
    background: #fff;
     -webkit-filter: grayscale(80%); /* Chrome, Safari, Opera */
    filter: grayscale(80%);
 }     
 
 
.grayscale img,  .grayscale div:not(.negishut_toolbar) {
   -webkit-filter: grayscale(80%); /* Chrome, Safari, Opera */
    filter: grayscale(80%);
}