The ink cartridges may be old or low on ink, and you may need to replace them.
Try turning off PhotoEnhance in the Windows printer software or on the Epson Stylus Photo RX595 control panel.
On a Macintosh, try using Automatic mode.
Try changing the Gamma setting in your printer software.
Your printed colors can never exactly match your on-screen colors. However, you can use a color management system to get as close as possible. Try using the ICM (Windows) or ColorSync (Macintosh) setting.
If you’re using color management profiles, select No Color Adjustment in the printer software.
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.