Transition of Color

input, textarea { 

    width: 280px; 
    -webkit-transition: width 1s ease; 
    -moz-transition: width 1s ease; 
    -o-transition: width 1s ease; 
    -ms-transition: width 1s ease; 
    transition: width 1s ease; 
 
} 
 
input:focus, textarea:focus { 

    width: 340px; 
 
}