Please don't use the hummingbird food with the red dye in it. It's not necessary to have red food when feeders always have bright colors to attract the birds. If you need some extra red for your feeder, tie a ribbon on it.
Those tiny bodies do not need to deal with the toxicity of food colorings and dyes. Despite the FDA approval of red dye #40, enough scientific evidence has accumulated that it has been banned in a number of countries.
You don't need to pay expensive prices for colored sugar. Simply use a ratio of 1 part sugar to 4 parts water and make your own. Be sure to boil the water, stir in the sugar and boil another 30 seconds, then cool and store unused portion in the refrigerator. My Ruby-throated Hummingbirds love this blend.
If you don't think they'll find your feeder, put a cheap Christmas bow on it and there will be no problem. If you're still not convinced, read more on the subject.