Blue is an amazing colour. This is one of the three primary pigments (red, yellow, blue), which can result in almost all the colours when mixed together. Isaac Newton identified it in the seven colours that make up the visible spectrum. He chose this, as the number of notes on the music scale was also seven and suggested that his optical spectrum of seven colours should be analogous. When we look up at daytime clear skies or the deep sea, we see blue no matter where we look due to an optical effect called ‘Rayleigh scattering’. The atmospheric perspective refers to another technique creating an illusion of depth by depicting distant objects bluer. With these physiological properties, vision allows us to see blue extremely well, with all its shades, and perhaps that is why blue is the favourite colour of almost half of males and females, according to studies in the United States and Europe.
Also, blue exhibits extreme diversity in colours. Most blues contain a slight mixture of other colours – azure contains some green, while ultramarine contains some violet. Hues of blue include indigo and ultramarine, closer to violet; pass through pure blue, without any mixture of other colours; Cyan being midway in the spectrum between blue and green, and end up with the other blue-green shades – turquoise and aquamarine. The dominant colour that will rule in interior design, architecture, fashion and decoration in 2020 is right in the middle – the extremely beautiful “Blue Harmony”.