It doesn't matter which scheme you use. The reason is that, with all CAT5/RJ45 cables and connectors, the only thing that matters is that pins 1 - 8 on the RJ45 connector on one end of the cable are conected to pins 1- 8 of the RJ45 on the other end. The colors of the individual wires is irrelevant.
The main reason the colors are used is for people who build custom length cables during installation: they often put one RJ45 on one end of the cable and then go to a different location to put the other RJ45 on. In this situation you have to know what color wire goes with what pin, so there was a standard wire color arrangement developed so that everyone knew what wire goes where.
Most crimpers, which is the tool used to physically attach an RJ45 connector to a CAT5 cable, have printed on them the wire color/pin pairs - but even this can vary by crimper.
Bottom line: it's not the colors that matter - it's what wire goes with what pin.