If you have it on, or asleep I have found that it will get to 99% and stay amber for like another 30 minutes afterward before it thinks its fully charged. So if its asleep the best thing to do is ignore the amber light and just look at the percent in the corner of the screen.
I remember when I first charged my iBook as well. It did seem to take forever, but oh was it worth it!!!
Don't' forget that after your battery is completely charged let the iBook run on battery power until it goes to sleep. This will calibrate the battery and give a more accurate reading of battery power in the future.
It's different for all people. Really there is no set color blindness. Some people can't tell the difference between red and green(which is bad for stop lights) and others like your dad can't do other colors. It all depends on genetics. And also, it is far mor likely to be color blind if you are a guy. Its something like 75% of color blind people are men. It all has to do with those damn Y chromosomes.