style and styleClass in MegaMenuItems

[narjes]

Hello all,

I have a megaMenu with items and I need to allocate a special style to some of these items. I've tried defining style and styleClass for these items:
{
label: this.utilities.translateService.instant('customer'),
style:"{background-color: red !important;}",
routerLink: '/basicInformation/customer',
styleClass: 'test',
},
but there is no change occurred! is there anything I've forgotten?
please inform me if you have any helpful idea.
thanks