Red is a primary color and cannot be produced by mixing other colors. Red, blue and yellow are the three primary colors. Only secondary and tertiary colors can be fabricated by mixing the appropriate colors together.
A fact is a piece of information that can be strictly defined and proved true. An opinion is a statement that expresses a belief, value, or feeling. An opinion cannot be proved true or false. For example, a person's age is a fact, but if someone is asked how old they feel, it is impossible to prove the person's answer to be true or false.
Hence, facts are really the real deal while theories are still unclear although presumed to be true. 1. Facts are observations whereas theories are the explanations to those observations. 2. Theories are vague truths or unclear facts whereas facts are really facts.