.black-white{-webkit-filter:grayscale(100%);-moz-filter:grayscale(100%);filter:grayscale(100%);-webkit-transition:ease .2s;-moz-transition:ease .2s;transition:ease .2s}.black-white:hover{-webkit-filter:grayscale(0);-moz-filter:grayscale(0);filter:grayscale(0)}