# File lib/rvg/rvg.rb, line 174
        def background_fill=(color)
            warn "background_fill= has no effect in nested RVG objects" if @nested
            if ! color.kind_of?(Magick::Pixel)
                begin
                    @background_fill = Magick::Pixel.from_color(color)
                rescue Magick::ImageMagickError
                    raise ArgumentError, "unknown color `#{color}'"
                rescue TypeError
                    raise TypeError, "cannot convert #{color.class} into Pixel"
                rescue
                    raise ArgumentError, "argument must be a color name or a Pixel (got #{color.class})"
                end
            else
                @background_fill = color
            end
        end