var d = new Date()
var h = d.getHours()

//
if (h < 7) document.write('<style type="text/css">body{background: #0f1633}"></style>')
else if (h < 18) document.write('<style type="text/css">body{background: #ADD9E6;}"></style>')
else if (h < 24) document.write('<style type="text/css">body{background: #0f1633;}"></style>')