.colorselect,
#link {
    background: rgba(90, 90, 90, 0.2);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 2px solid rgba(150, 150, 150, 0.2);
    border-radius: 50px;
    color: #fff;
    transition: 0.3s;
    outline: none;
}

.colorselect {
    width: 50px;
    height: 50px;
    padding: 3px;
    border-radius: 12px;
    /* un peu moins rond pour le différencier */
    cursor: pointer;
}

#link {
    width: 100%;
    height: auto;
    padding: 12px 18px;
    font-size: 20px;
}