table tr:nth-child(odd){background:#efefef;} table tr:nth-child(even){background:#efefef;} table td:nth-child(odd){color:red;} table td:nth-child(even){color:black;} table tr:nth-child(10){background:#efefef;color:red;} table td:nth-child(10){background:#efefef;color:black;} table tr:nth-child(3n+0){background:#efefef;color:red;} table td:nth-child(3n+0){background:#efefef;color:red;}
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