2 files changed, 21 insertions, 9 deletions
diff --git a/lib/ruby2d/color.rb b/lib/ruby2d/color.rb
index 26d176f..296f228 100644
--- a/lib/ruby2d/color.rb
+++ b/lib/ruby2d/color.rb
@@ -26,7 +26,7 @@ module Ruby2D
       end
     end
 
-    attr_reader :r, :g, :b, :a
+    attr_accessor :r, :g, :b, :a
 
     # Based on clrs.cc
     @@colors = {
@@ -128,4 +128,7 @@ module Ruby2D
     end
 
   end
+
+  # Allow British English spelling of color
+  Colour = Color
 end
diff --git a/lib/ruby2d/renderable.rb b/lib/ruby2d/renderable.rb
index 6a6761d..18c7a78 100644
--- a/lib/ruby2d/renderable.rb
+++ b/lib/ruby2d/renderable.rb
@@ -23,14 +23,23 @@ module Ruby2D
       end
     end
 
-    def opacity
-      self.color.opacity
-    end
-
-    def opacity=(val)
-      self.color.opacity = val
-    end
-
+    # Allow shortcuts for setting color values
+    def r; self.color.r end
+    def g; self.color.g end
+    def b; self.color.b end
+    def a; self.color.a end
+    def r=(c); self.color.r = c end
+    def g=(c); self.color.g = c end
+    def b=(c); self.color.b = c end
+    def a=(c); self.color.a = c end
+    def opacity; self.color.opacity end
+    def opacity=(val); self.color.opacity = val end
+
+    # Allow British English spelling of color
+    def colour; self.color end
+    def colour=(c); self.color = c end
+
+    # Add a contains method stub
     def contains?(x, y)
       raise Error, "\`#contains?\` not implemented for this class yet"
     end