A monochromatic colour scheme is created when values of only one basic colour is used, e.g. various tints, tones and shades of blue. To avoid the design from becoming dull, shifts in tone and intensity can help to provide contrast. Strong tonal and textural contrasts can also help to create interest, and provide depth and balance.
A monochromatic scheme should be based on the same segment of the colour wheel – using turquoise, Wedgewood blue and lavender blue would not constitute a monochromatic scheme as the first colour is blue/green, the second is a value of pure blue and the third is blue/violet. Rooms decorated in a monochromatic colour scheme are more successful when combined with a neutral (black, white, grey or an off-white) and usually benefit from a contrasting accent or accents.