#r {
    background-color: red;
    width: 100px;
    height: 100px;
    font-weight: bolder;
    font-size: xx-large;
}
#r:hover{
    background-color: brown;
}

#g {
    background-color: green;
    width: 100px;
    height: 100px;
    font-weight: bolder;
    font-size: xx-large;
}

#g:hover{
    background-color: darkgreen;
}

#b {
    background-color: blue;
    width: 100px;
    height: 100px;
    font-weight: bolder;
    font-size: xx-large;
}

#b:hover{
    background-color: darkblue;
}


#rgb_text{
    color: aliceblue;
}

.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.text{
    text-align: center;
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: Arial;
    font-size: 100px;
    font-weight: bolder;
}