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.
Glabellar frown lines are vertical lines between the eyebrows. They are created by the actions of muscles that insert on the skin along the inner end of the eyebrows. When minor they can be temporarily diminished by botox injections or permanently addressed by removal of the muscles that create them.