gnu: Add julia-colors.

* gnu/packages/julia-xyz.scm (julia-colors-0.9.6): New variable.

gnu/packages/julia-xyz.scm

@@ -1232,3 +1232,28 @@ working with colors in Julia.  It defines basic color types and their
 constructors, and sets up traits and show methods to make them easier to work
 with.")
     (license license:expat)))
+
+(define-public julia-colors
+  (package
+    (name "julia-colors")
+    (version "0.9.6")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/JuliaGraphics/Colors.jl")
+             (commit (string-append "v" version))))
+       (file-name "Colors")
+       (sha256
+        (base32 "1q2plh4iv3xqw7dd8xv4hshiv5xsg4d7dpd58y6zpip1fhpxpgrp"))))
+    (propagated-inputs `(("julia-fixedpointnumbers" ,julia-fixedpointnumbers)
+                         ("julia-colortypes" ,julia-colortypes)
+                         ("julia-reexport" ,julia-reexport)))
+    (build-system julia-build-system)
+    (home-page "https://github.com/JuliaGraphics/Colors.jl")
+    (synopsis "Color manipulation utilities for Julia")
+    (description "This library provides a wide array of functions for dealing
+with color.  This includes conversion between colorspaces, measuring distance
+between colors, simulating color blindness, parsing colors, and generating
+color scales for graphics.")
+    (license license:expat)))