diff --git a/lib/rubyXL/convenience_methods/cell.rb b/lib/rubyXL/convenience_methods/cell.rb
index ca380ea1b..9d143a06a 100644
--- a/lib/rubyXL/convenience_methods/cell.rb
+++ b/lib/rubyXL/convenience_methods/cell.rb
@@ -164,6 +164,7 @@ def set_number_format(format_code)
     # Changes fill color of cell
     def change_fill(rgb = 'ffffff')
       validate_worksheet
+      rgb.delete_prefix!('#')
       Color.validate_color(rgb)
       self.style_index = workbook.modify_fill(self.style_index, rgb)
     end
diff --git a/lib/rubyXL/convenience_methods/worksheet.rb b/lib/rubyXL/convenience_methods/worksheet.rb
index 8ac6e022b..72ce37671 100644
--- a/lib/rubyXL/convenience_methods/worksheet.rb
+++ b/lib/rubyXL/convenience_methods/worksheet.rb
@@ -478,6 +478,7 @@ def change_row_border_color(row, direction, color = '000000')
     end
 
     def change_row_fill(row_index = 0, rgb = 'ffffff')
+      rgb.delete_prefix!('#')
       validate_workbook
       ensure_cell_exists(row_index)
       Color.validate_color(rgb)