think of the colour spectrum. red, orange, yellow, green, blue, indigo, violet.
the higher the temperature, the higher the colour. example. in a bonfire, you mainly see red, orange, and yellow. if you have a gas, or propane bbq, you can usually see a blue flame.
this is because of the temperature the fire is and the chemical compound of the material. for example, copper burns green.
this may not be 100 percent true but i learnt this in science
@timpfeifer(View Post) please look at the last date on threads when you post, if you post on a thread from last year you will never get any response. You seem to post mostly on mods requesting new elements, but that will only work if it's a recent mod. Almost all mods have been abandoned, so asking on random threads doesn't help at all.
Also, posting on old threads like this is called a necro, and those are against the rules.