Don't pay much attention to my plants in the threads because most everything I grow is photoperiod and I harvest pretty early for most people's taste. I prefer a very clear head high with my stuff so I rarely let mine see more than a speck or two of amber. If a breeder calls for 60 days I am generally right on that time frame and sometimes a little earlier, which is ultra early for most growers.
As for your colors, well, you are probably correct. Don't count them out completely but you should have at least been seeing a little coloring in the leaves beginning to spread into the flowers if you were going to see some naturally. In a lot of plants you won't see the colors until you start loosing chlorophyll in the leaves. As the green starts fading you will begin to see the colors come out. If it is a colorful strain, or has some colorful genetics in it then sometimes you can coax it out by lowering the temperatures in the grow room. Most of the time, if you can get it below 70 you will see a lot of the "fall" colors come out of plants that you wouldn't generally see in them otherwise. Doing it with temperatures are generally not recommended because what the cooler temps does is create a phosphorus deficient plant but it happens in nature the same way. The roots begin getting cold late into the season and phosphorus isn't taken up as well in that environment. With most genetics nowadays it is high anthocyanin content that is bred into the plant. I have a few varieties of corn that look almost black there is so much anthocyanin in them. It is a very healthy anti-oxidant.