How can i change a color of a custom class label in inspector?,Color label of custom class in inspector scriptableObject

I'm trying to color my fields in inspecotr so that i know which of them are empty etc. Anyway the text colouring stage is the one i cannot really get to work

As you can see on a screen it is fairly easy to change a color of a basic type field (float in this case) my custom classes tho are not coloured and also do not serialize properly (that is a different problem i will fight with later)

my custom drawer code looks like this:

             EditorStyles.label.normal.textColor = Color.red;
             EditorGUI.PropertyField(position, property, label); //Draw the GUI
             EditorStyles.label.normal.textColor = Color.black;//Reset the color of the label to black

Can anyone help me with theese? I'm sure i just don't understant sth easy.