Glad you got it back to normal.
Lets try this ..

Go to Display and click the appearance tab - see the drop down menus ?
{on the windows and buttons drop down -are you using g Classic or XP style?}
I use Classic so the next group of choices might be different if you are using XP style.
but we can try it and see & it's easy to change back if not what you like.

So on the Color Scheme drop down click it to see the choices - click thru them -and it will show a little demo/display of what it would look like - you might have some that say large. if you find one you like fairly well i can tell you how to customize the color & font sizes one by one.
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If you don't see any thing you like and want to keep the colors that you have, we can do the next step which is to click the advanced button.
there is where you can set colors and font sizes to customize your theme.

I'll give you time to check it out and be back in a while.