You can change the theme color so the eraser gets a diferent color.

1.Click 'View'

2.Click on the down arrow button on the theme box

3.Click on 'Customize current theme' option in the dropdown list

4.Select 'Name and Colors' tab.

5.In the subsequent selection select 'Advanced'

6.In the 'Second Level Elements' you can select the color you want for the slicer level reset button.