ary. Most colors can be darkened effective by 
mixing in their complement, and a reasonable approximation to black itself can 
be mixed simply by combining other dark pigments. On the other hand, there is 
nothing wrong with black pigment that would make me avoid it if I was including 
other so-called &quot;convenience&quot; colors - ones you can reasonably mix yourself - 
like purple, orange, green, or any of the earth tones.</p>
<p>Once you have chosen your colors, you can arrange them physically on