Click the green flag, allow access to your webcam, then click scan. Position the cursor over the colour you want to scan, and press the spacebar. the system will then scan the colour, tell you which of the primary colours it is closest to, and let you draw with that colour. Press scan again to sample a different colour. changing the resolution changes the number of colour combinations it tries. A higher value will give a more true colour, but will take much longer.
