EditorGui.PropertyField, how do I reduce the label's width ?

I’m learning how to make custom PropertyDrawers for a custom struct, it has three properties named r, g, b.

The following code…

public override void OnGUI(Rect position, SerializedProperty property, GUIContent label){
	position = EditorGUI.PrefixLabel(position, label);
	EditorGUI.PropertyField (position, property.FindPropertyRelative ("b"));

…lets me display the property B in this manner :


I’m trying to cut the width of this property by 3 so I can put 3 floats in a row similar to how Vector3 are displayed.

I figured how to place multiple float field in a single row in a way that looks good, but it only works well If I remove the labels with GUIContent.none, else the labels always sticks with this absurdely huge width you can see above, and I couldn’t find any way of altering it.

How do I reduce the width of the “B” label when using EditorGui.PropertyField ?

Does it work for you to temporarily change the value of EditorGUIUtility.labelWidth?