The tabs for the different sheets in a workbook, which are at the bottom of the screen, can be given different colours. If you right click on a tab you can change the colour.
active tab
Home Tab
It is on the Page Layout tab.
in the home tab
the Home Tab
Home tab
Sheet tab
At the bottom of the screen.
If you save it when the first tab is open, then it will reopen on the first tab.
On the Insert tab.
Right-click on the tab and select option for tab color.
This would be under the tools tab. Go into excel and click on this tab to see all of the options that are available for modifying your axis labels.