Welcome back from the holiday.
This week consider how you are using your color. Try out one painting to make that uses all the deviations of a single color, not monochrome, but let that color dominate and variate from cool to warm, from light to dark so that its not even apparent that you're working in one color.
Here is an example of this that I recently completed in my studio for you to use as an inspirational model:
|Brent Ridge, Rusted Yellow, 2017|
See you in class.