White can be a difficult color to photograph. Doing so requires careful attention to the "temperature" of your image by adjusting the white balance setting. Today is a good day to play with adjusting your white balance manually. I generally have my WB set to 5000K, a good right in the middle setting. To determine the white balance setting in a particular image, photograph something in your scene that is white. Since today's prompt is paper, you can also place a white piece of paper in the scene for a test shot. You want that piece of paper to be a true white in your photo. Adjust your white balance either up or down to achieve the white you want. Temperature can be edited in post-processing, but it sure is nice to get it as close as possble in camera! To understand light color and Kelvin, take a trip to the lightbulb aisle at your local home improvement store. That is the quickest way to see what is meant by the various numbers!
See what you can do with shooting a black and white image in color.