If you are writing UI code and you want the controls you are drawing to appear as if they are labels until they are in focus you can use  the EditorGUIUtility.LookLikeInspector & EditorGUIUtility.LookLikeControls methods.

public class LookLikeControlsInspector : EditorWindow
{
    private int integer1;
    float float1 = 5.5f;

    [MenuItem("Examples/Look Like Controls - Inspector")]
    static void Init()
    {
        var window = GetWindow<LookLikeControlsInspector>();
        window.Show();
    }

    void OnGUI()
    {
        EditorGUIUtility.LookLikeInspector();
        EditorGUILayout.TextField("Text Field:", "Hello There");
        EditorGUILayout.IntField("Int Field:", integer1);
        EditorGUILayout.FloatField("Float Field:", float1);
        EditorGUILayout.Space();
        EditorGUIUtility.LookLikeControls();
        EditorGUILayout.TextField("Text Field", "Hello There");
        EditorGUILayout.IntField("Int Field:", integer1);
        EditorGUILayout.FloatField("Float Field:", float1);
    }
}