How to use color picker tool in Windows 8 Paint?
Color Picker Tool is used to match any color in an image.
Step 1: In Home tab, select Color picker icon from the Tools box as shown in below picture,
Step 2: Pick the color from the image using the colour picker tool.
Picked color will be reflected in the color option which is selected default. Also paint bucket tool will be selected by itself to fill with the color picked.