In high end professional commercial installations... well, the coax is already color coded, but we have 100 pieces of it, so the answer is to number them right on the cable. As said above, in your case, you just need to write on the cable you want for red: RED with a Sharpie permanent marker. Mark both ends of the same cable at the same time. Double check that you have RG-6 cable and NOT RG-59 cable. You can use RG-59 but the quality is not the same as RG-6 by a long shot.
Coaxial cable by Liberty, Belken, and Extron is what we have used in installations where perfect 1600x1200 resolution is required (higher quality than HDTV), and the cable is basically RG-6 type cable, not better, not worse. So yeah, just write on it, or the colored tape is a better/cooler way to do it, but even that is overkill.
So easy - you'll be psyched.