I find that true too, but for me it's especially dark colors...may look as one color in house light, but take to a window in the sunlight....may be different.... I shall never forget, when I worked in an office and we dressed "business attire", one of my co-workers came in one morning all frazzled...seems she dressed in semi-darkness as to not wake children and inadvertently put on one black pump and one navy pump...same basic style, so didn't realize until arrived at office...