[[M]] [[CSS]] 彩色标签 9个循环 ``` .tag:nth-child(9n){background-color: #4A4A4A;} .tag:nth-child(9n+1){background-color: #428BCA;} .tag:nth-child(9n+2){background-color: #5CB85C;} .tag:nth-child(9n+3){background-color: #D9534F;} .tag:nth-child(9n+4){background-color: #567E95;} .tag:nth-child(9n+5){background-color: #B433FF;} .tag:nth-child(9n+6){background-color: #00ABA9;} .tag:nth-child(9n+7){background-color: #B37333;} .tag:nth-child(9n+8){background-color: #FF6600;} ```