How to change fill color of check boxes in multiple answer matrix table?

Hi all,

The check boxes in my matrix table (likert, multiple answer) turn white after I select them. I would like the selected check boxes to turn teal (#44b8bd). I was able to successfully do this with the regular multiple and single answer questions with the following code:

.Skin label.MultipleAnswer.q-checked, .Skin label.SingleAnswer.q-checked {
background: #44b8bd;
Background-color: #44b8bd;
border-color:#44b8bd;
color: #000000;
}

.Skin label.MultipleAnswer.q-focused.q-checked, .Skin label.SingleAnswer.q-focused.q-checked {
background: #44b8bd;
}

I'm not sure how to make the selected check boxes in the matrix table the same color.

Can someone help?

Thanks!