Color codes and associated lengths
For XLR, Video and Network cables

The Code
For all XLRs, Video, and Network cables 

 1'-3': Green 

 5': Orange 

 10': White 

 15': Purple 

 25': Yellow 

 30'-35': Blue 

 50': Red 

 75': Red + Orange 

 100': Red + White 

 150': Red + Purple 

 200': Red + Yellow 

 250': Red + Blue 

 300+': Red + Red