body {
    background-color:#2b2b2b;

}
h1,h2 {
    color: white
}
a:link    {color:white; background-color:transparent; text-decoration:none}
a:visited {color:lightgrey; background-color:transparent; text-decoration:none}
a:hover   {color:gray; background-color:transparent; text-decoration:underline}
a:active  {color:white; background-color:transparent; text-decoration:underline}
.good{
    background-color:green;
    color:white;
    text-align: center;
}
.moderate{
    background-color:yellow;
    color:gray;
    text-align: center;
}
.us{
    background-color:orange;
    color:white;
    text-align: center;
}
.Unhealthy{
    background-color:red;
    color:white;
    text-align: center;
}
.veryunhealthy{
    background-color:purple;
    color:white;
    text-align: center;
}
.hazardous{
    background-color:maroon;
    color:white;
    text-align: center;
}
tr{
    color:white;
}