lib/write_xlsx/utility.rb in write_xlsx-1.11.0 vs lib/write_xlsx/utility.rb in write_xlsx-1.11.1

@@ -339,11 +339,11 @@
     end
 
     #
     # Write the <color> element.
     #
-    def write_color(writer, name, value) # :nodoc:
+    def write_color(name, value, writer = @writer) # :nodoc:
       attributes = [[name, value]]
 
       writer.empty_tag('color', attributes)
     end
 
@@ -749,11 +749,11 @@
 
     def palette_color(index)
       # Adjust the colour index.
       idx = index - 8
 
-      rgb = @palette[idx]
-      sprintf("%02X%02X%02X", *rgb)
+      r, g, b = @palette[idx]
+      sprintf("%02X%02X%02X", r, g, b)
     end
 
     #
     # Workbook の生成時のオプションハッシュを解析する
     #