How to Change color of "All" Children Buttons In my server browser?

Hello, I am currently working on my MainMenu Server Browser and I have hit a wall. Its more than likely pretty simple to do but my brain decided to stop working.

Basically I have made a server list/browser that I can scroll through and see all the hosted servers. I can click on them and highlight the server button and set it as selected, However, When I click another server in that list I can highlight that to but the server that was highlighted before hand will not revert to not highlighted.

I have a scroll box and when a new server is created it will simply create a child showing the server name and such. How can I make it so when I click another child in that scroll box it will set set all other children to a specified color?