Rainbow Gradient

background-image: linear-gradient(
    90.2deg,
    rgba(216,0,0,1) 3.8%, rgba(255,255,41,1) 17.5%, rgba(12,243,0,1) 29.2%, rgba(0,243,231,1) 43.3%, rgba(18,0,243,1) 59%, rgba(243,0,243,1) 82.2%, rgba(243,0,0,1) 99.6%
);