Poll: Color Rules

My husband often says, "There are no bad colors, only bad applications". Meaning, teal on a chair with 80s inclinations may be great (ok, maybe teal is an exception, let’s start again….) Every instance we use paint is unique and requires so much thought and skill that some modernists often say, "Screw it, paint it white". (Chantilly Lace, @Benjamin Moore, highly recommended). 

 The question for discussion is; are there any hard and fast rules about color that could help all of us?