Blue light has the strongest impact. Exposure to blue light (and white light, which contains blue light) during the sensitive period can make it difficult for you to fall asleep and stay asleep. Exposure to white light during the day can have positive effects, including boosting alertness and mood.
Because red light has a low color temperature and does not make our brains respond so much to its wavelengths, red is the best way to switch from daylight to night without interrupting your sleep cycle.
Physiologically, red is thought to be a stimulating color. One study found that people in a red room experienced more brain waves associated with an alert, awake state. Other studies have found that the color red increases heart rate and blood pressure.
What is the best color light to wake up to? To simulate the sun's brightness, most wake-up lights are yellow. This energizing color is one that your body is naturally inclined to associate with morning. Colors like purple and red are often used for simulating the sunset, and may be more conducive to falling asleep.
Light from electronic screens comes in all colors, but the blues are the worst. Blue light fools the brain into thinking it's daytime. When that happens, the body stops releasing a sleep hormone called melatonin. Melatonin is nature's way of helping us wind down and prepare for bed.
Several studies suggest that light exposure at the wrong time can disrupt circadian rhythm and potentially impact your health. When your circadian rhythm is off, you can end up in a vicious cycle. You can't sleep well at night, and you feel tired and in need of a nap during the day.
Blue. Blue is perhaps the best color for your bedroom. Not only is it more muted, but blue tones also tend to have more calming effects on the brain, as shown in a 2018 study of blue walls in a university residence hall.
Turns out, compared to all the different coloured lights, blue light is the most energising. All the colours we see have different wavelengths and therefore, different frequencies. The shorter the wavelength, the higher the frequency and the more energy the colour has.
A high color temperature is connected to optimal studying performance and focus. Cool white light is the best LED light color for studying.
They monitored participants before, during, and after exercise under 3 different color temperatures: 3000K (warm white), 5000K (white), and 7000K (bluish white). The researchers found that those under 5000K light were the most alert and focused, performed better, and had the best feeling of accomplishment afterwards.
Yellow is said to be the happiest color, promoting optimism and positive thinking.
Red light. Red light is by far the best calming light color for sleep. Choosing a red light as a nightlight ensures that you don't disrupt your circadian rhythm. So switching to a red light a few hours before going to bed will surely help you fall asleep easier.
"Shades of blue or green are always very calming. Blues are especially known to have a relaxing effect perfect for creating a serene feeling at home," says Nicole Gibbons, interior designer and founder of Clare Paint.
How do different colors of light affect our ability to fall asleep? Scientists from Oxford University have the answer. Last year, the team tested green, blue, and violet light on mice. They found that green light produced rapid sleep onset -- between 1 and 3 minutes while blue and violet delayed sleep.
According to leading design experts, the best wall colors for a bedroom are warm pastels, soft white paint shades, and neutral-leaning blues and greens.
1) Green: Concentration
Low wavelength colors promote restfulness and calm, and they improve efficiency and focus. So that's why green is an excellent color for improving concentration. Apart from being one of the easiest colors on the eyes, it reminds us of nature. That's why TV stars stay in the 'green room'.
Low wavelength colors, colors that help you focus like green and blue have been shown in scientific studies to improve focus, and efficiency. Green is especially useful for home office workers who spend a lot of time in front of the screen, as it lessens eye fatigue.
Do certain colors improve memory? In one study, students in British Columbia scored higher on memory tasks when completing them on a red background.
The energy of colored light increases in order: red, yellow, green, blue, violet.
Violet light has the shortest wavelength, and so it has the highest level of energy of visible light.
Violet colour has minimum wavelength ,so maximum energy.
There's some evidence that red light may induce sleepiness. However, more human research is needed to back this theory. It's well-documented that blue light can have a negative impact on your melatonin levels.
Protect yourself from blue light at night
Use dim red lights for night lights. Red light is less likely to shift circadian rhythm and suppress melatonin. Avoid looking at bright screens beginning two to three hours before bed.
The human eye is less sensitive to longer wavelengths, so red light is chosen to preserve the night vision of the crew while still allowing them to still see their instrument panels. Submarines switch to red light when it's dark outside and crew members need to use the periscope or go on watch duty.
More so than any other color, blue light messes with your body's ability to prepare for sleep because it blocks a hormone called melatonin that makes you sleepy. Bottom line: You're less drowsy than usual at night, and it takes you longer to fall asleep.