Twombly was known for his large-scale, freely scribbled, calligraphic-style graffiti paintings, on solid fields of mostly gray, tan, or off-white colors. He exhibited his paintings worldwide. Twombly's paintings blur the line between drawing and painting. Many of his best-known paintings of the late 1960s are reminiscent of a school blackboard on which someone has practiced cursive "e"s. Twombly had at this point discarded painting figurative, representational subject-matter, citing the line or smudge – each mark with its own history – as its proper subject. 