Agree with @MajP.
Although easy to do in Excel, its not possible in Access.
You can easily edit the back colour & pressed colour properties, but there is no method by which each tab can be given a different colour.
It can only be done by faking the effect as shown in the link in post #2
You get two choices AND they are pervasive. The color scheme of a TAB control is derived from your current Windows theme. Those items will use SYSTEM colors and that is for Selected or Not Selected. Two choices only. AND those choices apply to every other application (even non-Access applications) that have tabs.