.template:before{background-image:linear-gradient(90deg,#fda,#fff,#fda)}
#persp{
  background:linear-gradient(90deg,red 10%,orange,yellow,green,#099,blue,indigo,violet,magenta);
  box-shadow:0 10px 3px -3px rgba(0,0,0,.5);
  border-bottom-right-radius:50% 11%;
  border-bottom-left-radius:50% 11%;
  border-top-right-radius:50% 8%;
  border-top-left-radius:50% 8%
}
.tpl{
  color:aqua;
  mix-blend-mode:difference;
  filter:url(#color-outline1)
}