Is there a meaning of stripes on RS485, Phone and Ethernet cable?
User @Justme was correct about it being a twisted pair but the stripped line indicates positive and solid colored line indicates negative.

So for an example, let's say you have two twisted pairs: One for RX and TX. Much like RJ45, etc., RS485 will also have RX and TX signals.


Picture can be found here... Not my picture.
The positive and negative wires are for differential signaling. 

You can find more details on that with this Network Engineering StackExchange answer (What do the positive and negative (+/-) transmit and receive pins mean on Ethernet cables?).