THe Keto stick is what keeps me on track too. I like seeing any color at all on that stick, it keeps me motivated to keep eating right!
ANy color at all is ketosis, not just the dark purple! At the beginning I would test everytime I went to the bathroom!
I found that at different times of the day it would be a different shade. Now I just do it once every couple of days usually in the afternoon or evening. Just to keep me honest!
So you are doing great if the stick is turning colors!