Every wonder how to determine the RGB or HEX of a color on an image ? Try this: (instructions via Windows operation system)
1.) Snap a screenshot or use windows snipping tool to snag an image. For this example, I snagged an image from google.com
2. Save the image and then open it up with Windows Paint, select the color picker tool and then click once on the color.
Notice that Color 1 in Paint changes to your color
3.) Click Edit colors and you will get a screen showing you the RGB code (lower right hand corner).
4.) From there if you need to convert it to HEX, google RGB to HEX and there will be plenty of websites that can take the codes and convert them for you.