How to get the theme color of a Word document in C#?

Question

I want to get the theme color of my document by C#. I found out the way to know color RGB in powerpoint. But in Word document, I don't know how to get the information I need.

ColorScheme colorScheme = this.presentation.Slides.Range(1).ColorScheme;
MessageBox.Show(colorScheme[PpColorSchemeIndex.ppAccent1].RGB.ToString());
MessageBox.Show(colorScheme[PpColorSchemeIndex.ppAccent2].RGB .ToString());

I hope you can help me. Thank you so much. Sorry if my English is not good.