Just make sure it boiled for 20 minutes. Do not count the time it took to reach a boil. If you do not want to dye the part, just boil it in plain water for 20 minutes to seal the pores. The pale lemon color will change to a lighter shade. Different aluminum alloys will have different natural anodized colors.
Some alloys are easier to anodize and dye than others.
6061 alloy responds great. I have used unknown scrap pieces of aluminum and all have anodized and dyed just fine. After the part has boiled for 20 minutes, rinse it off and remove any dye powder residue that is on it. Enjoy and don't smoke near the anodizing tank.