.color-back {
    position: fixed;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    -webkit-transition: all 0.6s cubic-bezier(0.77, 0, 0.175, 1);
    transition: all 0.6s cubic-bezier(0.77, 0, 0.175, 1);
    z-index: 999;
}

.color-back--open {
    width: 100%;
    cursor: url("../img/close.png"), auto;
}

#first-color{
    width: 33%;
    padding: 5px;
    margin-top: -40px;
    cursor: pointer;
    float: left;
}