Thanks for answering.
I use PE 12 with Windows 8.1.
OK; i see, colors at most 235. I hope it will be no problem because I only need to correct what is wrong.
About using some more professional program to ensure the color is safe for broadcast. The best strategy is probably if I ask somebody who has a professional program, import it on that computer, and if the color is too extreme, then export a new file with corrected colors. Telling the computer what to do should take just one minute, and exporting a new file would then simply require some patience.