Light yellow tends to disappear into white, so it usually needs a dark color to highlight it. Shades of yellow are visually unappealing because they loose cheerfulness and become dingy. Dull (dingy) yellow represents caution, decay, sickness, and jealousy. Light yellow is associated with intellect, freshness, and joy.
The definition of a frown is a facial expression indicating displeasure by drawing the brows together and turning the lips downward. An example of frown is the face you make when you are unhappy about something.
What exactly are frown lines? Frown lines are the lines in the skin which are formed by the movement of muscles of expression, so-called dynamic lines because they depend on motion for creation as opposed to lines from photo damage (lifetime sun exposure).