Generate a random HEX color in cojure or clojurescript

random-color.clj

(require '[clojure.string :as s])

;; My initial attempt
(def c [:0 :1 :2 :3 :4 :5 :6 :7 :8 :9 :A :B :C :D :E :F])
(str "#" (s/join (map name (repeatedly 6 #(rand-nth c)))))

;; Another option not using keywords (/ht locks in #clojure)
(def c [0 1 2 3 4 5 6 7 8 9 \A \B \C \D \E \F])
(str "#" (s/join (repeatedly 6 #(rand-nth c))))
;; the last line can be simplified even more (/ht xificurC in #clojure)
(apply str \# (repeatedly 6 #(rand-nth c)))

;; This works on Clojure (/ht wei__ in #clojure)
(format "%x" (rand-int 16rFFFFFF))
;; this works in Clojurescript
(.toString (rand-int 16rFFFFFF) 16)

(str/upper-case (format "%06x" (rand-int 16rFFFFFF)))

^ added the zero padding, thanks :)