Fastmath 2.1.8 released. This release solves the issue with abs introduced in Clojure 1.11 (https://ask.clojure.org/index.php/11672/fastmath-errors-in-1-11) + some other minor bugs. Please do not use 2.1.7 version (deployed too early). Thanks @alexmiller for bringing this to my attention. https://github.com/generateme/fastmath

Also, Clojure2d 1.4.4 is released (depends on fastmath). This version brings shape abstraction and contains revisited and updated clojure2d.color namespace. Please refer #clerk https://clojure2d.github.io/clojure2d/docs/notebooks/index.html#/notebooks/color.clj for a full reference. I believe this namespace covers almost everything needed for color operations (it can be used in #quil too, see https://clojure2d.github.io/clojure2d/docs/codox/clojure2d.color.html#var-quil ). Enjoy! https://github.com/Clojure2D/clojure2d