You could go wild colour coding your worksheet tabs creating a real kaleidoscope.  But if you use the colours sparingly and allocate say two different colours to your main two sheets, you won’t need to spend that extra second reading the tab names because you’ll recognise the colours more quickly and be able to switch between to sheets more quickly.

Try it:

1. Right click a worksheet tab to display the shortcut menu.
2. Choose Tab Colour to open the colour palette.
3. Select the colour you want to apply to that tab.
4. Select another tab to see the result.