The 'purple series' in colorful pictures typically refers to a collection or theme of images dominated by shades of purple. This could include photography, art, or graphic design focused on the color purple, which is often associated with elegance, mystery, and royalty. In various cultures, purple also holds symbolic meanings, such as representing wealth or spirituality. When discussing this topic, one might explore color theory, the use of purple in different artistic mediums, and its psychological effects on viewers.