All of the above answers worked but did have their faults. The below code is an amalgamation of two of the above answers that works flawlessly with no blinking.
input:-webkit-autofill, input:-webkit-autofill:hover, input:-webkit-autofill:focus, input:-webkit-autofill:active { transition: background-color 5000s ease-in-out 0s; -webkit-box-shadow: 0 0 0px 1000px #fff inset; } input:-webkit-autofill, input:-webkit-autofill:hover, input:-webkit-autofill:focus, input:-webkit-autofill:active { transition: background-color 5000s ease-in-out 0s; -webkit-box-shadow: 0 0 0px 1000px #fff inset; }