body{ background-color: gray;}
p { color: blue; }
h3{ color: white; }
H2{ color: darkblue;
    text-align: center;}
<style type="text/css">

#erics{ 
    text-align: center;
    color: darkblue;
}
.centerimg{
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.blocktext{
    margin-left: auto;
    margin-right: auto;
    color: red;
    width: 6em
}
.zahl {
    line-height: 1.5; }
.blackprozent {
    line-height: 75%;
    color: black;}
.prozent {
    line-height: 75%;}
.linksbuendig {
    text-align: left;}
.rechtsbuendig {
    text-align: right;}
.blackrechtsbuendig {
    text-align: right;
    color: black;}
.zentriert {
    text-align: center;}
.blackzentriert {
    text-align: center;
    color: black;}
.blackzentriertsmall {
    text-align: center;
    color: black;
    font-size: small;}
.blocksatz {
    text-align: justify;}
td {
    text-align: ","}
.black {
    text-colour: black;}
</style>