Marketing experts refer to the pairing of yellow and red as the "Ketchup and Mustard ... This is can be seen in the logos for Subway, Starbucks, and Whole Foods. Related Slideshow: Colorful ...

When you combine red and yellow it's about speed, quickness. In, eat, and out again." Moreover, yellow is the most luminous colour on the spectrum and attracts instant attention - giving the logo ...