[Request] Checkbuttons are too hard to see. Need a way to change color or make more visible.

[Jables-Supreme]

Is your feature request related to a problem? Please describe.
I'm unable to tell whether or not a checkbox is checked. For example, when queueing for LFR or LFD and I need to choose a role, I am unable to see which roles are already chosen. Some settings are somewhat visible, but the LFD is the hardest to see for me.

To be completely open, I am colorblind, and I have tried the colorblind settings to see if it makes a difference and it does not.

Describe the solution you'd like
Either a more contrasting color and/or texture used to indicate a box has been ticked, or a slider or something to allow the color to be changed.

[Gethe]

The check for checkboxes use the highlight color. By default this is your class color, but there is an option to override this with a custom highlight color.