https://medium.com/@caseorganic/why-the-color-of-technology-must-change-caae7f1ca061

When I was 14, I saved up money from my first web design job to trick out a really nice gaming PC. I outfitted my computer with tons of blue LED fans, and I kept it on at night, right next to my bed. Shortly after, I realized my sleep patterns were changing. While I wasn’t staying awake any later, it now took me longer to get to sleep. Was I eating differently? Was it just a part of being a teenager? Was it the light in my room? But the orange light from my 80s era alarm clock wasn’t keeping me up. I finally determined that it must be the particular shade of blue light from my new computer. It took me some research to realize all this, but once I did, I started turning my computer off at night. Problem solved. And when I bought my next computer, I ordered fans with orange lights.

The bright blue light of flat, rectangular touch screens, fans, and displays may be appealing from an aesthetic perspective (more on that below), but from a health standpoint, it is fraught with problems. Blue light inhibits the production of melatonin, the hormone that regulates our sleep cycles. Blue light before bedtime can wreak havoc on our ability to fall asleep. Harvard researchers and their colleagues conducted an experiment comparing the effects of 6.5 hours of exposure to blue light, versus exposure to green light of comparable brightness. They found that blue light suppresses melatonin for about twice as long as the green light and shifted circadian rhythms by twice as much (3 hours vs. 1.5 hours). And worse, it’s been linked in recent studies to an increased risk of obesity and some cancers.