Interface Color
You can change the color of Theme Manager's user interface. The user interface are the windows, tabs, buttons, forms, dialog boxes, etc. that make up Theme Manager. Simply move the slider with your mouse, by left-clicking & holding down the button as you drag the slider to the desired position (color). As you move it, the color will change. Click “apply change" when you find the right color. (Even if you do not click “apply change", the color change will still take effect.)
To change the color back to default, move the slider to the far left.