The main reason is that the colour blue is calming. It's also said to represent trust, serenity and efficiency.
According to website Colour Affects, “Blue is the colour of the mind and is essentially soothing; it affects us mentally, rather than the physical reaction we have to red.
“Strong blues will stimulate clear thought and lighter, soft blues will calm the mind and aid concentration. Consequently, it is serene and mentally calming.”
If the colour blue isn’t enough to calm your nerves on a flight, there’s another trick worth trying.
Appearing on the Today Show in the US earlier this year, pilot Captain Ron Neilsen revealed a calming technique to help anxious flyers.
Simply grab a pen and paper and start writing your name with the opposite hand you would normally write with.
“Just keep writing your name,” he said.
“It first causes her to focus extra-hard on what she’s doing, because she doesn’t normally write with her other hand ... and not on the turbulence.
“And the second thing is, it’s actually crossing over her motor function in her brain, using the other side of her brain from what she would normally do. We’re disrupting the thinking.”