is there some sort of capacitence/inductence issue at stake then?
Since, if there isn't, then you really could connect pin one to pin one and
so on...once you hook the cable up, the device you are connecting decides
which pins to use...unless there is some sort of interaction going on
between the wires in the twisted pairs?
The colors are completely relevant to a sited person insuring the right
wires get to the right pins, but after all, its all the same copper wire the
colors really make absolutely no difference...for instance if you are
supposed to connect the red and green wires to pins one and two, why can you
not connect the blue and yellow wires to pin one and two? the same
electrical signal will pass through weather its green, blue, purple black
whatever just as long as you connect those same two to pins one and two at
the other end of the cable.
....but again, perhaps i am unaware of some sort of capacitence/inductence
properties of the twisted pairs.
You don't need to insure industry standard when building the cable since no
one is going to cut it and get all confused when they go to rewire a jack or
something.

73
Colin, V A6BKX