Hi Wsayef, I hope you received my email to your message box directly, if not, here are again three alternatives of one world colors for viewing:
primary colors with middle green included: http://www.spoonflower.com/designs/3509255,
second one is without green or red but with 1970s wibe: http://www.spoonflower.com/designs/3509288,
third one is called hospital with referring colors: http://www.spoonflower.com/designs/3509305
The basic combed cotton automatically mutes colors from 'neon'-look, as it shows on the screen. This specific design is created in pop-art colors, thus the brightness. I can post another color alternatives with primary colors and also earth tones, with the workload I have right now I will have links available for viewing on 9/11!