The term 'bluish black' can be described as 'INKY', which is a four-letter word. INKY is a dark, bluish-black color that is often used in printing and writing. It is a deep, dark shade of black that has a slight blue hue to it. INKY is often used to describe the color of ink, such as that used in a fountain pen or a printer. It is also used to describe the color of certain fabrics, such as velvet or satin.