This is the normal color of the beads. If they have turned dark amber it is time to change them. Mine went 9 years before I had to change them, probably should have done it at 8 years.
As for regeneration......Pick up one of these, a few Walmarts, but very few carry them. https://www.filtersfast.com/P-Intell...Tester-Kit.asp
Test your water after regeneration, then check it once a week. When it climbs more than 20 points, it's time to regenerate, depending on what the water is like in the area you are in. I can go about a month before regeneration.