Autofill usually changes the background color but in some areas, we don’t want that default color, so this script is to change the default color.
Just add the following pseudo-selector to your style sheet and the background color will change according to your needs through ‘-webkit-box-shadow’.
This is
.headsearch__input:-webkit-autofill,
.headsearch__input:-webkit-autofill:hover,
.headsearch__input:-webkit-autofill:focus,
.headsearch__input:-webkit-autofill:active {
border: 1px solid #999;
-webkit-text-fill-color: #ffffff;
-webkit-box-shadow: 0 0 0px 1000px #151718 inset;
transition: background-color 5000s ease-in-out 0s;
}