I decided to look into the use of colour schemes within graphics as I believe colour is such a deciding factor in creating messages and tones.
Whilst doing research, I found this article that details picking colour schemes for your infographics that I found very relevant to the progress I had made in my project.
The article details sticking to preferably two (with a maximum of four) main colours and then using shades of those colours if needed instead of employing more colours. By doing this the graphic will not be overpowered by all these colours and the components will flow.
The infographic above used shades of colours instead of picking more colours to feature in their graphic.
The article also comments on letting the content of your graphic decide your colour pallet. It would be unwise to use green for the skin colour of a person as it would just look unrealistic and weird.