Which Choice Do I Pick When I Am Ready to Download My Project? CMYK or RGB?
Once your project is completed and you are ready to download it, you have 2 choices.
Click on "Project" on the drop down menu in the Studio.
Your choices are "Download this Porject (CMYK)" & "Download this Project (RGB)".
In short, if you are doing a printed book, choose the CMYK version, and if it is for the screen, like an e-book then choose RGB.
Click here to see a detailed article about this.