Not just an embarrassed blush, but all sorts of colors, based on feelings like trust, empathy, suspicion, delight, doubt, impatience, desire and rejection.

(Of course, there might always be the polka dot prospect to make a sale more difficult, but at least you would have a clue as to what your customer is thinking.)

Would you be able to anticipate the emotional colors of your customer's and know how to change the way they feel about your product, adjusting the yellow light of suspicion as you speak?

Great messaging colors your bottom line. The better you understand your customers needs, the more likely the color you'll see is green.