/*this all does the same thing*/

::selection {
    background-color: black;
    color: rgb(43, 80, 201);
}

::-moz-selection {
    background-color: black;
    color: rgb(43, 80, 201);
}

::-o-selection {
    background-color: black;
    color: rgb(43, 80, 201);
}

::-ms-selection {
    background-color: black;
    color: rgb(43, 80, 201);
}

::-webkit-selection {
    background-color: black;
    color: rgb(43, 80, 201);
}