Another element within our comic was significant colour for each story. As the whole comic is black and white, we decided to add one colour to individual story, and use both of them every time these stories cross over. Dave's storyline had a link to red colour, mine was a colour of whisky or crates, and Benj's was yellow. When I came up with this idead of using colours I thought it might give a reader little hint of how it works as the whole.
I think it worked out quite well.