Last time I tried to so this, it never ended up at the color I wanted... BUT the color it was (ink blue I think) looked on screen as black. So I found a calculator that said this:
<You will see a message that your chocobo is beginning to grow new feathers each time the colour changes as you feed, this confirms that your chocobo will be a different colour in 6 hours. If you don't see this message, you should feed an additional 1-2 of the recommended fruit until you do.>
So there are like 34 steps to get from yellow to white... does the above MEAN that I apply a snack and wait for the message before I go onto the next snack? Which would mean I need a lot more of each of the three snacks it needs (the last time I did it, I rarely saw that message and did not know whether to wait for it or not).