Dear Hoang Chu,
You can go to /templates/sj_expo/menusys/class/common/css/menustyle.css and find:
For color menu1:
ul.navi li.level1:nth-child(7n+1) > .item-link, ul.navi li.level1 > .item-link.item1, ul.navi li.level1:nth-child(7n+1) > .item-link:before, ul.navi li.level1 > .item-link.item1:before {
background-color: #0082C8;
}
For color menu2:
ul.navi li.level1:nth-child(7n+2) > .item-link, ul.navi li.level1 > .item-link.item2, ul.navi li.level1:nth-child(7n+2) > .item-link:before, ul.navi li.level1 > .item-link.item2:before {
background-color: #B93466;
}
For color menu3:
ul.navi li.level1:nth-child(7n+3) > .item-link, ul.navi li.level1 > .item-link.item3, ul.navi li.level1:nth-child(7n+3) > .item-link:before, ul.navi li.level1 > .item-link.item3:before {
background-color: #FEC420;
}
For color menu4:
ul.navi li.level1:nth-child(7n+4) > .item-link, ul.navi li.level1 > .item-link.item4, ul.navi li.level1:nth-child(7n+4) > .item-link:before, ul.navi li.level1 > .item-link.item4:before {
background: none repeat scroll 0 0 #7F2D25;
}
For color menu5:
ul.navi li.level1:nth-child(7n+5) > .item-link, ul.navi li.level1 > .item-link.item5, ul.navi li.level1:nth-child(7n+5) > .item-link:before, ul.navi li.level1 > .item-link.item5:before {
background-color: #F35B28;
}
For color menu6:
ul.navi li.level1:nth-child(7n+6) > .item-link, ul.navi li.level1 > .item-link.item6, ul.navi li.level1:nth-child(7n+6) > .item-link:before, ul.navi li.level1 > .item-link.item6:before {
background-color: #008000;
}
For color menu7:
ul.navi li.level1:nth-child(7n+7) > .item-link, ul.navi li.level1 > .item-link.item7, ul.navi li.level1:nth-child(7n+7) > .item-link:before, ul.navi li.level1 > .item-link.item7:before {
background-color: #DC143C;
}
=> Please change 'background-color: above_color;' to 'background-color: your_color;'
Thanks!