In this quick watercolor painting of a narrow street in Rabat, Malta, the goal was to keep the shadow together as one shape. The edge of the shadow is cool on the upper right, where it picks up the color of the sky.
And the shaded buildings on the left are warm where they receive reflected light from the warm illuminated buildings.
But compared to the light tones in the distance, the shadow is one basic tone, and I tried to downplay the detail in the doorways and windows in the shadow area to keep it simple.
Here's how the little street appeared as I painted it, with bells ringing and car driving into it.