Colour can majorly affect how productive you are.
What defines whether a colour is stimulating or soothing is not the colour, it’s the intensity. A strong bright colour will stimulate, and a pastel colour will soothe.
Interestingly, when you combine more than one colour, you get the effects of both of them. For example, if you combine a bright/bold yellow with a bright/bold blue, you will get a colour that stimulates both your emotions (yellow) and mind (blue).
If you need to stimulate your mind, then blue would likely make you the most productive. If you do mind-work all day, try blue with a bit of orange.
If you’re a designer, and you want creativity, make yellow your choice, because it stimulates your ego and spirits, and makes you more optimistic.
If you want to be more productive doing something physical, the colour red would make you more productive because it stimulating.
If you’re in an environment where having a strong sense of balance is the most important, the colour green might just be the colour that makes you the most productive.
To determine which colour to paint your office, first decide which main colour (or combination of colours) will work the best in your profession by deciding whether you want to affect your mind, emotions, body, or balance.
At the same time, the colour chosen is both scientific and personal to you.