Vinyl stickers are a SINGLE color with no background color. The real background color will be the color of the surface you apply it to. Any background color in the listed pictures (such as white, or black) are used just to show the design clearly. An example would be a white sticker with a black background (In that example the sticker is white only--background is black just for show--as white on white would make the sticker not visible).  

All vinyl stickers come in three pieces: backing paper, the sticker itself, and transfer tape. Application is very simple. Start by cleaning the surface of the application area. Remove the backing paper, and then position the sticker where you would like it (keep in mind to align the sticker itself, and not the transfer tape--as the tape will be removed later). Next, get a firm thin item like a credit card and slide it firmly across the top of the sticker (transfer tape) to make sure the sticker will stick; it helps to slide from multiple angles with pressure to help the vinyl stick. Finally, you can slowly remove the transfer tape, leaving only the sticker behind. Note: I attached a instruction manual by the picture of the decal for you to refer to also.