Custom designing checkbox buttons

Im trying to custom design checkbox buttons so they don't look like the typical checkbox button. Im trying to achieve the following:

(note the check and cross marks are images.)

Ive been able to achieve this so far:

But I can't seems get rid of the small white checkbox where the tick appears. I am trying to change the css of the checkbox button on selection. For example is yes is checked the border turn to green otherwise stay grey.

Is possible to do?