How to change Tab color in Oracle APEX

In the page css inline:
.t-NavTabs-link.tab1_link{background-color:red}
.t-NavTabs-link.tab2_link{background-color:rgb(25, 201, 33)}
tab1_link, tab2_link are defined in the ' user define attributes' '4. Link Class'
in tab list.

[@user-ov4cw8ez9g]

Keep going you're doing good work!