This was an exercise that was quite time consuming but very worthwhile. I was surprised how easily the white was overwhelmed by colour and how little black needed to be added for the shades. We started our with 6 squares of colour on water colour paper. The top squares were painted black or white. colour was then added to the monochromatic to achieve a mid shade. From that the darker and lighter colours were made be adding more colour or adding the mid colour to white. Even though I knew you started with the lightest colour and added the darker colour to it, it was easy to forget and need to start over. Creating the two colour palettes for each of the 12 colours on the colour wheel took quite a while but it was worth it and these will be useful in identifying what colours make up a colour in a fabric. I mixed my colours on a sheet of laminated white paper and this provided an excellent palette - an idea from Laura Kempthorne. And I kept the white and black in a well palette as these were a constant.