How to change the menu color

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Go to your .css file and replace this

#access {
    background: linear-gradient(rgb(37, 37, 37), rgb(10, 10, 10)) repeat scroll 0% 0% transparent;
    box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.4);
    clear: both;
    display: block;
    float: left;
    margin: 0px auto 6px;
    width: 100%;
}

With this

#access {
    background: transparent;
    box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.4);
    clear: both;
    display: block;
    float: left;
    margin: 0px auto 6px;
    width: 100%;
}