note: Utah release brings in Theme builder changes which may make below steps unnecessary

ServiceNow Next UI: theme your instance - QUICK HACKS

to change the header colour:

apply it across the board:

• go to sys_ux_style and create an entry as follows (give it whatever name you prefer, e.g. 'header UAT':
  

grab your own variant color code from https://htmlcolorcodes.com/

see below to copy paste code

• go to now experience framework> themes, create a new theme, and reference the above newly created from UX Theme Styles tab
  
  
• create new system property glide.ui.polaris.theme.custom and copy-paste the sys_id of the above new theme

apply it as a user preference:

similar steps to above, but set the sys_ux_style type to 'variant' (use insert and stay) then add it to the same theme as the core one. Log out and back in and go to user preferences> themes

other options

see the ux style 'colors' for list of options/ideas

(https://<YOUR_INSTANCE>.service-now.com/nav_to.do?uri=sys_ux_style.do?sys_id=a197a38107b03010e03948f78ad30059 )

menu color

{

    "base": { },

    "properties": {

        "--now-unified-nav_header--background-color":"51,172,255",

        "--now-menu--background-color": "51,172,255"

    }

}

sidebar color

{

    "base": { 

       

    },

    "properties": {

        "--now-unified-nav_header--background-color":"51,172,255",

        "--now-menu--background-color": "51,172,255",

        "--now-unified-nav_menu--background-color": "51,172,255"

    }

}

revert back to default

just blank the glide.ui.polaris.theme.custom sys property

revert back to default - with variants

the following theme achieves this, reference its sys id in the above property

(it should remember the variant selection next time you log in)

(ServiceNow )