style.css

body{
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-size: 12px;
    background: #eee;
}
div{
    display: inline-block;
    cursor: crosshair;
}
#sk1:active{
    cursor: crosshair;
}
#sk2{
    cursor: none;
    pointer-events: none;

}
.menu{
    display: block;
    height: 55px;
    width: 100%;
    background-color: #eee;
    padding: 10px;
    box-sizing: border-box;
    text-align: center;
    cursor: default;
}
input[type="color"]{
    -webkit-appearance: none;
    appearance: none;
    width: 37px;
    height: 37px;
    border: none;
    outline: none;
    background: transparent;
    cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper{
    padding: 0;
    border: 2px solid #000;
    border-radius: 50%;
    box-shadow: 0 0 5px 2px #666;
}
input[type="color"]::-webkit-color-swatch{
    border: none;
    border-radius: 50%;
}
input[type="range"]{
    -webkit-appearance: none;
    width: 50%;
    background: transparent;
    outline: none;
}
input[type="range"]::-webkit-slider-thumb{
    -webkit-appearance: none;
    height: 30px;
    width: 15px;
    border-radius: 3px;
    background: #fff;
    cursor: pointer;
    margin-top: -6px;
    box-shadow: 0 0 5px 1px #222;
    opacity: 0.6;
    border: 1px solid #000; 
}
input[type="range"]::-webkit-slider-runnable-track{
    height: 20px;
    background: #3176f2;
    border-radius: 10px;
    box-shadow: 1px 1px 5px #666;
}

#output{
    position: relative;
    width: 30px;
    height: 25px;
    text-align: center;
    border-radius: 5px;
    font-weight: bolder;
    font-size: 20px;
    color: #eee;
    background: linear-gradient(#36f, #58f);
    border: 2px solid #3176f2;
    top: -6px;
    left: 0;
    z-index: 0;
    display: inline-block;
    margin-left: 30px;
    cursor: default;
}
input[type="range"]:active::-webkit-slider-thumb{
    opacity: 0.8;
}
#title{
    position: absolute;
    margin: 0;
    margin-top: -6px;
    margin-left: 32px;
    text-align: center;
}