You can easily make layers of grays and blacks look more interesting with the use of texture. For a leisurly Saturday afternoon of shopping I layered a classic v-neck t-shirt with a silky kimono and knit and faux fur vest. Along with my old black denim jeans, I added velvet loafers, a felt floppy fedora, a leather bag and some silver jewelry!
http://www.thefabulouslifeofanaturaldisaster.com/2014/01/07/lazy-day-gray-layers-textures/