This modified triad color scheme is the same as an extended analogous color scheme with two colors omitted.
Blue / Violet, Blue / Green and Green / Yellow. The Two colors omitted are Blue and Green. I felt like the color sketch was screaming for a bit of orange so I filled in the closed shapes in the title and date. Whew….. a bit of relief from the overpowering frogginess of the trumpet parts.
Sketchbook color sketch: drawn first in ink with fountain pen, followed by watercolor on thin, wrinkly paper.