add to xml code color black.

        <syntaxColor id="CodeColor_TagSelector_DefaultBackground" bgcolor="#EFEFEF" />
        <syntaxColor id="CodeColor_TagSelector_DefaultArrowFill" bgcolor="#D6D6D6" />
        <syntaxColor id="CodeColor_TagSelector_ArrowHoverBorder" bgcolor="#AAAAAA" />
        <syntaxColor id="CodeColor_TagSelector_ArrowSelectedColor" bgcolor="#00C0FD" />
        <syntaxColor id="CodeColor_TagSelector_RootTagBorderColor" bgcolor="#999999" />