Document Setup Before Plotting:
     
   
  Check 1: Verify the document size is at least 2" smaller than the plotter's paper roll width
    How to correctly set a custom page size
(Photoshop, Illustrator, InDesign, and Adobe Acrobat documents)
   
   
  Check 2: Verify your document is in the RGB color mode for accurate colors

Note: Indesign automatically sets the proper RGB color space, no configuration is required.
  How to set an RGB color document in Photoshop
  How to set an RGB color document in Illustrator