Editor Scriping: Centering an element in Rect container

I have been playing around with editor scripting for a while but I can't seem to figure out some aspects of it. For example, I have GUI.Label that shows a text that prints "Conditions" which is displayed in a Rect. How would I align it to the center? Rect.center seems to give the Vector2 value for center of the Rect but I would still require the size of the GUI.Label to make it perfectly centered I guess?

P.S: I am trying to center the text in its yellow container, NOT center the container in editor window.

 void OnGUI()
 {
 Rect conditionsTitle = new Rect(0, 36, 196, 36);
 Color yellow = new Color(1, 1, 0);
 EditorGUI.DrawRect(conditionsTitle, yellow);
 GUI.Label(conditionsTitle, "Conditions", EditorStyles.boldLabel);
 }