Checkboxes & radio buttons: Disabled state not clear enough

Steps to reproduce

Steps to reproduce

1. Go to any page with a checkbox. Use compare mode (all properties) and make changes to the checkbox property.
2. (This applies for all forms even outside of compare mode).

Actual: Both enabled and read only are blue but with different intensity. The difference is not enough according to user feedback.

Expected: See screenshot. Enabled = blue. Disabled = gray

NOTE: Update the image with the attached sprite. Make sure it is updated at ux.episerver.com as well.