using (Graphics graphics = Graphics.FromImage(refBitmap))
            {
                graphics.CompositingMode = CompositingMode.SourceCopy;
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
                using (Brush brush = new SolidBrush(ColorTranslator.FromHtml("#5482C341")))
                {
                    graphics.FillEllipse(brush, centerX, centerY, radius * 2, radius * 2);
                }
            }