Red/orange
what color must be used as the background on Biohazard Warning lable
OSHA requires that the background of biohazard labels be fluorescent orange or orange-red. The writing and symbol need to be in a contrasting color.
You can design custom sticky labels at Advanced Labels NW. You can order One Color Labels or Four Color Labels. They also have a graphic design team which will assist you.
no
Clothing was predominantly white.
For golden address labels, a contrasting color is preferred so the text does not become hard to read. Gold is a pretty light color, so I suggest black.
The color scheme of the site is predominantly blue. If that's not what you were trying to ask, I have no idea what you mean.
Gamut warning is an option in Photoshop when you are about to make a change in color.
Color labels can have many different uses. It depends on what you want to use them for. Some user suggested uses are here at this website. http://www.lightroomforums.net/showthread.php?9590-Colour-labels-do-you-use-them-For-what
there are mostly yellow.
Yellow
The best and most affordable place to go for labels is Vistaprint.com. You can get whatever you want and usually just have to pay shipping on it.