One of the challenges for new painters is to master value. One way we can focus on value and therefore learn a lot about it is to basically eliminate colour by using a monochromatic colour scheme ie just use one colour. Of course if you choose to use yellow or some light colour you would need to mix it with the complement to be able to render darks but it would still read as primarily yellow. In this little painting I choose a colour that had quite a dark value all by itself. My colour was actually a mixture of cad red light and viridian. When used with almost no water it produces a strong dark value.
I find this a particularly pleasing composition.