Fantastic Voyage: Colour Ideas

After making these paintings of my kelp forest, I had an idea of possibly having it change throughout the animation. I'm not sure if it'd work, as I can see it possibly clashing with the mood the narrator is putting on or maybe it'd be too colourful for a 'scary' animation but I figured I'd post it up just in case it was a good idea. From the previous post I think the green kelp forest would work best since a pill appears and releases antibiotic, but I also think that red might work well for the leviathan as it'd be in the blood. So overall, I'm not sure if this idea would work but it might also keep the kelp forest from being too boring/repetitive. Any ideas/thoughts/feedback welcome.