developing a style and colour palette

In this series of illustrations I have begun to refine my style and think about a suitable colour palette. The colour palette I have chosen to opt for consists of rather muted, warm tones primarily, with an odd hint of more vibrant colours to brighten up the otherwise fairly bland nature of the whole illustration. The one thing I want to highlight in each panel/illustration is only the essential part of the steps, which I plan on doing by leaving the non-essential parts of the imagery colourless to emphasize the task at hand.

Having now drawn this a few times and seeing how tacky it looks with traditional media like pens, pencils etc, I'm thinking about colourizing the entire thing digitally, which wasn't my original plan, however the outcome should be much more refined and professional and with a more solid colour palette, will hopefully be more appealing, especially to my desired audience of younger people.