.block1 {
    background: #2f2f2f;
}
#s1 {
    color: #ffffff;
}
#s2 {
    color: #c19be4;
}
.red-block {
    background: #ff0000;
    width: 100px;
    height: 100px;
}
.block2 {
    background: #ce99ff;
    width: 300px;
}
#s3 {
    color: #ffffff;
    background: #563575;
}