windows - Is there a graphical way to get an RGBA value from a pixel in an image?

Is there a free way possible to open an image in a PC environment, click on the image, and obtain the RGBA value on the pixel that you clicked? I'm looking for a way to do this in a PC Windows environment.

Edit: This question asks specifically about RGBA, which is not addressed at the marked duplicate Best way to pick a color from an Image. I don't believe any of the answers there have a way to obtain an alpha value. (RGBA as opposed to RGB).

Answer

GIMP can do this. Using the color picker tool you can select the color in question while pressing shift. It will give you the RGB but if you look below it also contains the Alpha data.