For the color studies project, I used a picture of a plant as my reference photo. I learned how to use the brushes in photoshop to paint my reference photo using 

Monochrome, Complementary, Split Complementary, and Tetrad colors. 

First, I used Adobe Color to find the colors I would be using from the color wheel. I then created swatches in photoshop to use while painting. 

After I made all my swatches I painted over the plant reference photo. 

For my monochrome painting I used all different shades of green. 

For my complementary painting I used shades of blue and orange. 

For my split complementary painting I used shades of orange, blue, and green. 

For my tetrad painting I used shades of yellow, purple/pink, and blue.