Color

         
         .btn-grad {
            background-image: linear-gradient(to right, #DC2424 0%, #4A569D  51%, #DC2424  100%);
            margin: 10px;
            padding: 15px 45px;
            text-align: center;
            text-transform: uppercase;
            transition: 0.5s;
            background-size: 200% auto;
            color: white;            
            box-shadow: 0 0 20px #eee;
            border-radius: 10px;
            display: block;
          }

          .btn-grad:hover {
            background-position: right center; /* change the direction of the change here */
            color: #fff;
            text-decoration: none;
          }