The power of contrast can not be ignored. Each color looks different depending upon the colors adjacent. Remember, simultaneous contrast is just as important in your box as it is on your painting, it affects your choices. The neutralized orange (with wrapper) looks much more appealing next to the grays rather than the colors with more chroma. That is why when I organize my pastel box I have two rows of magnificent grays. They make the chroma in the painting work.
Here is my cleaned box. Late yesterday I cleaned and organized my box ready for more plein air work. My choice in boxes is the Heilman backpack box- small and sturdy.
Below see one of my cleaning methods- a large piece of screen wrapped over the box. With the screen in place I can vacuum the box and my precious pastels are still protected!