It will make them easier to identify later. Be sure to check the Web site of your Linux distribution for a hardware compatibility list. Technically you are buying patch cables. Patch cables are meant to take more abuse. There is another grade of Cat5 cable for running inside walls, but it is not meant to take the abuse of being out in the world where it gets twisted, moved, stepped on, and so forth.
Cables come in a rainbow of colors.
To be a serious network geek, buy the cable in bulk, a crimper, and connectors. Cut it to length and crimp the connectors into place your own self. Alternatively, there is no shame attached to buying it already crimped. Be prepared to be seduced by wireless networking, which is configured pretty much the same as wired. Get your Ethernet LAN up and running.