The word "blackishness" refers to the quality or state of being somewhat black in color. However, there are various synonyms that can be used to describe this shade or tone. For instance, the word "charcoal" implies a deeper, darker shade of black. "Sooty" suggests a shade of black that's smudgy or grimy, while "ebony" hints at a smoother, glossier version of black. "Inky" points to a deep, rich shade of black, while "jet" refers to a pure, dark hue. "Midnight" suggests a black color that's associated with the night sky, and "obsidian" implies a deep, opaque black that's reminiscent of volcanic glass.