Possibly more potassium in the tomato? Potassium having a purple flame and plama. http://www.webmineral.com/help/FlameTest.shtml http://www.webmineral.com/help/

Possibly more potassium in the tomato? Potassium having a purple flame and plama. http://www.webmineral.com/help/FlameTest.shtml http://www.webmineral.com/help/FlameTest.shtml However, your eye/brain is seeing energy in a bunch of spectral bands, and making a decision as to what colour to call it.