Thank you for writing back.
To change this color at runtime you should use the SetThemeValueOverride
method which changes a theme property for a particular state. For example:
There is no way to get the color of the disabled state from the theme at a run time. And this is not connected to the element life cycle. Perhaps for your case, you can set the disabled color for both of the controls at runtime. However, please note that when this approach is used you should call the method for each control. If the theme is changed the color will be applied to all controls.
I hope this will be useful.
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