Colors Washed Out Upon Export (Premiere Elements)

Hello,
I’m hoping someone can help me solve an issue where the colors in my video appear brighter/washed out upon export.
While editing in Adobe Premiere Elements, everything looks great. (Fig. 1 in the accompanying image.)
When I export it, the exported video looks washed out, when viewing in QuickTime Player on my macbook. I uploaded it to Youtube and it also looks this way when viewing on Youtube on my Macbook, on my chromebook, and viewing through the YouTube app on my Television. (Fig. 2)
Oddly, when I bring the exported footage back into an Adobe Premiere Elements project, it appears within Premiere with the correct colors. (Fig. 3)
Additional Info: The export is MP4 H.264, high quality, 1920x1080.
Any idea why this color discrepancy is happening and what I can do to fix it?
Thanks!
Alex
