below is direct from power pro website, as i mentioned earlier i have not used a braid that dosen't "bleach out" mainly because they are made from the fiber "micro dymeena" and "spectra" most people do exactly what HDW mentioned, one thing i'll add, and it may have already been mentioned, cut a V in the end of a marker and keep it with you in your tackle box, as several have mentioned no single line is perfect for every application, but braid has its place for sure
Coloring PowerPro
Spectra Fiber is an especially dense material that cannot be permanently dyed. The color simply encapsulates the line and will wear away with time. This is normal and does not affect the strength or performance of the line. To re-color your PowerPro line, simply use a permanent magic marker in whatever shade you prefer.