title: Color Intensity using Average RGB values
body: <p>I am working on a project where I need to calculate a color gradient on various paper strips. I have used RGB color detector app (available on Google PlayStore) to obtain RGB values. Now to plot it I simple average RGB values : (R+G+B)/3 and get a single values as intensity. Is it okay to use it or should I use other methods to obtain a single value for intensity.</p>
  
  <p>The color gradient I get is ranging from dark yellow color to white. Discoloration of paper occurs with increasing concentration of chemical used. [Chemical cannot be disclosed, sorry]</p>