.content { background: #FFEEEE; background: -webkit-linear-gradient(to right, #DDEFBB, #FFEEEE); background: linear-gradient(to right, #DDEFBB, #FFEEEE); } .panel-header { color: black; } .panel { background: rgba(255, 255, 255, 0.5); } .component-set { background: rgba(255, 255, 255, 0.5); }