twisted cable colour pair (568a and 568b) -- does the colours matter ?

[SJ K]

Hi all,
 

I have understand the difference in the colours pairing between 568a and 568b.

Q1) As I can make a straight cable, using both 568a on both side, or 568b on both side. And even for crossover cable, as long as 1 head is 568a and another as 568b, it doesn't matter where head/direction is plug into the devices requiring crossover cables. (e.g. I can plug headA into device B or headB Into device B)

Hence can I check, does the colours in "GreenStrip/Green" 568a and "OrangeStripe/Orange" 568b has any significant differences in terms of usages ? 

Q2) Can I know what are the blue and brown pairing use for ? As I know the green and orange are use for TX/RX and vice versa

Regards,
Noob

[Joseph W. Doherty · Accepted solution]

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The cable color coding is really only to insure that you can identify the same cable wire on both ends.

Usage of specific color coding, for specific pins, is just a convention. That convention is likely to be found on the Internet, if you search for it.