.green{
    background-color: rgba(0,100,0,0.9);
}

.tint-b1{
    background-color: rgba(0,0,0,0.85);
}

.tint-w1{
    background-color: rgba(200,200,200,0.85);
}

.tint-w2{
    background-color: rgba(255,255,255,0.8);
}

.col-main{
    color: #333;
}
.col-green{
    color: green;
}
.col-white{
    color: #fff;
}

.error{
    color: red;
}