I did this sort of tutorial process, to shown how we can affect the color of a scene just a little bit and change the accent of an scene, driving the attention of the view from one point to another in a panel from a comic.
In this case I use the lines of the awesome Fabio Ramacci
As you can see I started with just the lines, then I added some color for the flats, no matter what colors cause these just are useful to select the colors later and do changes to convey the mood we are looking for.
AFter that I duplicate the layer and change the colors for the night scene.
Is here changing the colors and with the render that we guide the eye of the viewer, in this case I added subtle changes in very of the panels to show how I change the main focus from the boy at the front to the door behind the sleepy guys.
¿What you think?