I agree with navcom - there are no guarantees you will get good color, but you can always help the color along by using filters. The sunset the other day was pretty ordinary, but it looked way more dramatic with a Sunset 2 filter
__________________
Pentax K100D, Sigma 70-300mm F4-5.6 Macro Super II, SMC Pentax-DA F3.5-5.6 18-55mm AL, SMC Pentax-M 1:2 50mm, Vivitar 1:2.8 MC Wide Angle 28mm, Pentax 540FGZ, Vivitar 285HV, Cactus wireless trigger and receivers
Flickr