Derek Jarman’s 1993 “Blue,” a luscious sound and music collage, was made as he was fading because of AIDS-related complications and his vision was reduced to a field of shadowy blue. Or “Yves Klein blue,” which, in its 35mm incarnation, becomes more effectively hypnagogic than it might sound, as each projection adds a scratch here, lint there, and its wear becomes a unique element of its presentation. (On DVD, the image never changes, and the electronic blue is another matter than the back-lit, photochemical one.) Jarman’s eccentric musings wax widely, accompanied by a brilliant score-cum-sound sculpture by Simon Fisher Turner that is ironically heightened by the assertive lack of a traditional image. 75m. (Ray Pride) “Blue” plays Sat, Mon, Wed at Siskel.