1 Half fill a large saucepan with cold water and add a tablespoon of sea salt and seasoning if you wish. 2  Bring the water to the boil and then drop the crab legs in.  Reduce the heat slightly and allow the crab legs to simmer and heat up for 5 - 7 minutes.
Answer 1: Blue flames come from very hot, complete burning of air and fuel. Orange color comes from cooler spots in the flame where fuel isn't being totally burned and these produce a little bit of soot and smoke. The color of the flame is related to the heat of the flame. Think about the colors of different hot things: the Sun is white or yellow, a hot stove is red, a camp-fire is orange, and a gas flame is usually blue. These colors come from different kinds of a light and different places in the electromagnetic spectrum.
Here are individual colors for a rainbow of fire, for flame colors from red to violet... 1  Red Fire. 2  Orange Fire. 3  Yellow Fire. 4  Green Fire. 5  Blue Fire. 6  Violet Fire.