A colourway is a range of colour combinations in which a style or design is available.
I took my psychedelic poster and digitised it on Adobe Illustrator. I used this opportunity to try out different colourways and see the affects of each.
This is the original design and colourway of my poster:
Below I used a complementary colour scheme, which are the colours that are opposites on the colour wheel. In this case I used purple and green, this creates contrast and makes the poster very bold.
Finally, I used a monochromatic colourway. Monochromatic means the same colour but different shades of it, in this case blue. This makes the poster look very neat and clean, however it can come across a little bit boring or dull, as there is not much contrast between the colours.