Changing <ion-radio> background color using angularjs

Hello,

I’m currently trying change the background color of a ion-radio tag. I have a quiz application with 4 questions (4 ion-radio tags) and I want the color of the of the selected answer to change to a specific color ( for example, choosing the correct answer will make the ion-radio background color green, choosing the wrong answer will make the ion-radio background color red). Is there any way to do this with Angularjs?