I have them too and I'm generally in the slight to moderate range- though I don't really check that often. After a workout you will really see some dark purple! I have read that it doesn't really matter how dark they are- either you're in ketosis or you aren't. They also will show much darker when you have drank less water.

I check mine first thing in the morning and before bed each night. I am always in the slight section but today was the 1st day of my 3rrd week and I'm finally in the moderate section. I've lost 6lbs total but put a pound back on after drinking alcohol over the weekend. But I'm back at it. Still keeping under my 20 carbs per day.

Good luck with the Ketostix. I use them as a guide and something to look forward too.

I used them the first time I did Atkins, but haven't used them since. If you are sticking to your carb count, you should be fine. Every time you fall off the wagon, it usually takes a full two days to go back to burning fat again instead of carbs. They can be a good motivator at the beginning though.