There are four psychological primary colors - red, blue, yellow and green. It is said that they relate respectively to the body, the mind, the emotions and the essential balance between these three.
By mixing the primary colors eleven other basic colors can be derived. But for an artist's eye there are hundreds more. Call them shades. Their psychological properties are powerful.
Green strikes the eye in such a way as to require no adjustment whatever and is, therefore, restful. Being in the centre of the spectrum, it is the colour of balance - a more important concept than many people realise.
When the world around us contains plenty of green, this indicates the presence of water, and little danger of famine, so we are reassured by green, on a primitive level.
Negatively, it can indicate stagnation and, incorrectly used, will be perceived as being too bland.
Pure grey is the only colour that has no direct psychological properties. It is, however, quite suppressive. A virtual absence of colour is depressing and when the world turns grey we are instinctively conditioned to draw in and prepare for hibernation. Unless the precise tone is right, grey has a dampening effect on other colours used with it. Heavy use of grey usually indicates a lack of confidence and fear of exposure.
You can not escape the Colors of Life.