Magic Forums

Ok, so when i was a kid I always used to love how in cartoon when a character performs a spell the colors of the candle lights change. I forgot this when i started my serious magical training but i have come across a technique used by some which involves adding various chemical salts to a flame to change its color in the setting of a magical ritual. What I am wondering is whether the actual energy from the chemical salts would disrupt the flow of the spell or if it should be ok as long as the colors correspond to the intent of the spell and/or put me in the right meditative mood.