New Layer: Monochrome

 

Draw lines in the areas where you want to apply tones,

separating them for easier filling.

 

When using the Close Gap function,

small unpainted areas may appear.

Display color samples in the Sub View

Select the color from the Sub View using the Eyedropper tool (top left) in Layer Color.

 

Paint with black first,

then change the color later to improve efficiency.