#cnblogs_post_body h2 {
background: gray !important;
background: #406CA4 !important;
border-radius: 4px 4px 4px 4px !important;
box-shadow: 0 0 0 1px #5F5A4B, 1px 1px 6px 1px rgba(10, 10, 0, 0.5);
color: #FFFFF0;
font-family: "微软雅黑", "宋体", "黑体", Arial;
font-size: 17px;
font-weight: bold;
margin: 15px 0 !important;
padding: 5px 0 5px 10px;
}
#btn{
    width: 50px;
    height: 65px;
    display: none;
    position: fixed;
    left: 50%;
    bottom: 30px;
    margin-left: 610px;
    background: url("https://files.cnblogs.com/files/daynote/ew.bmp" )no-repeat left top;
}
#btn:hover{
    background: url("https://files.cnblogs.com/files/daynote/ew.bmp" )no-repeat left -40px;
}

# 取色网址：https://www.114la.com/other/rgb.htm

标题背景色带代码