color.RGBA is no longer hardcoded

drawer.go

@@ -13,11 +13,13 @@ type Drawer struct { TypeSetter }
 // Draw draws the drawer's text onto the specified canvas at the given offset.
 func (drawer Drawer) Draw (
 	destination draw.Image,
-	color       color.RGBA,
+	color       color.Color,
 	offset      image.Point,
 ) (
 	updatedRegion image.Rectangle,
 ) {
+	source := image.NewUniform(color)
+	
 	drawer.For (func (
 		index    int,
 		char     rune,
@@ -39,7 +41,7 @@ func (drawer Drawer) Draw (
 		draw.DrawMask (
 			destination,
 			destinationRectangle,
-			image.NewUniform(color), image.Point { },
+			source, image.Point { },
 			mask, maskPoint,
 			draw.Over)