GUI.backgroundColor and unity pro

We have recently switched to unity pro, and it appears that some of my UI elements have been influenced by the dark theme.

This used to be bright yellow:

GUI.backgroundColor = Color.yellow;
EditorGUI.LabelField( new Rect( position.x, position.y, startupPercent, height ), "startup", EditorStyles.toolbarButton);

How could I set the color without the background influencing it?

Hey there,

You would need your own style. Most of the editor styles are somewhat transparent, which is why the images look different on pro.