Colour Theory

Analogous

Selecting colours that are touching in the wheel created a narrow, harmonious colour scheme. Similar to monochromatic colours. Analogous colours provide a predominantly warm or cool feeling, depending on where they lie on the wheel.


Complementary

Colours from the opposite end of the wheel provide the most contrast. If you can stave off the temptation to add more colour, limit them to only two to create a powerful (or even starting) look. But arrange them wisely so they don't clash.


Monochromatic

Using variations of the same colour can create a striking palette. but its difficult to use colour effectively without adding black, white and shades of grey for contrast. Select colours with a broad range of tints and shades to provide enough contrast.

References
Image 1 - Colour theory | unique & limited edition typographic posters (no date) Available at: http://postography.co.uk/poster/colour-theory/ (Accessed: 8 December 2015).