More often than not, brilliantly colored fabrics become dull renditions of their formal selves after several cycles through the wash. It seems, beyond the simple wear-and-tear of our modern laundry devices, colors fade due to residual build-up of our detergent, waters over 130 degrees and failure to properly set fabric dyes.
Tip: The first wash cycle of new colored laundry should be without detergent. In its place, use 1 cup of white vinegar to help set the dyes. Wash on cold. If you are washing garments and not sheets, turn them inside out. You will not have a vinegar odor left behind and if you so choose, you can rewash the fabrics using your regular detergent. Dry as directed by the fabric label.