I knew it

Value does the work but colour is more fun.  First subject is saturation.  The exercise is to mix 2 primaries and then slowly add the other primary to desaturate the colour.  I used cadmium red, cadmium yellow and Ultramarine blue. The first column is an orange (from the red and yellow) and blue is slowly added.  The next is green added by red and the last is purple adding yellow.  The purple didn't really change that much - I guess the yellow is weak in comparison.  The final column is cadmium red desaturated by equal amounts of blue and yellow.

I mixed it with a palette knife and I was quite careful to keep the knife clean which is a habit I should develop.  

Grey or Gray - I never know which one is right and the spell checker isn't helping it accepts both.  I have always argued with teachers that it makes no sense to worry about complements.  For example to get the a red grey you have to  mix red with its complement  - green which is blue and yellow.  So you are mixing all the primaries.  I never understood worrying about the complement just mix all the primaries and you add more of any colour to get it to lean to the colour you want.  If you want a bluer grey just add more blue.  Carol agrees with me.  She just mixes red, blue yellow and sometimes white to get a grey. 

I told you so.