The colors in the image on my monitor do not match the output from my Epson Stylus NX400. What's wrong?
Your monitor and the Epson Stylus NX400 use different technologies to represent colors, so your printed colors can't match your screen colors exactly. Try increasing your monitor's color palette to view a greater range of colors, and then try the following:
Use a color management system. Try using the ICM (Windows) or ColorSync (Macintosh) setting.
For best results, use genuine Epson ink and paper.
After you print, the colors on your printout will take some time to set as the ink dries. During this time, the colors may look different than you expect. To reduce the drying time, avoid stacking your prints on top of each other.