H1 {
    color:red;
    background:white;
    text-align:center
}
H2 {
    color:WHITE;
    background:MEDIUMAQUAMARINE;
    text-align:center
}
H3 {
    color:blue;
    background:WHITE;
    text-align:center
}
H4 {
    color:BLUEVIOLET;
    background:WHITE;
    text-align:center
}
H5 {
    color:skyblue;
    background:WHITE;
    width:300;
    text-align:center
}
A:hover { color:red; }