Ever thought of a custom scroll bar with same theme as site color simple easy elegant Simple and Flat

::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    /* -webkit-box-shadow: inset 0 0 6px #293E65; */
    border-radius: 0px;
    background: #fff;
}
::-webkit-scrollbar-thumb {
    border-radius: 0px;
    background: #1A315B;
}

With Gradient

::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px #bf64cb;
    border-radius: 8px;
}
::-webkit-scrollbar-thumb {
    border-radius: 8px;
    background: linear-gradient(#bf64cb, #81338b);
}