Blue is the hardest color to see as more light energy is required for a full response from blue-violet cones, compared to green or red.
These colours (yellow, green, orange) are in the middle of the visible spectrum (the range of colours that our eyes can detect) and are the easiest for the eye to see. Our eyes are not as receptive or sensitive to the colours at the extreme ends of the visible spectrum (e.g., blue, violet/purple, and red).
The short answer is Red. The red color is the hardest to see in the darkness. The cones recognize the color and send a message to our brain.
It's best to use a warmer (yellowish) color temperature in dark rooms and a colder (bluer) color temperature in bright rooms.
Different wavelengths of light excite different combinations of cones to varying levels, which generates our perception of color. You can see that the red cones are most sensitive to light, and the blue cones are least sensitive.
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.
The vast majority of people in the world have brown eyes. The second most common color is blue, but people can also have green, gray, amber, or red eyes. Some people have eyes that are different colors than each other.
Pink, up to the 16th century, was considered a shade or red and was generally associated with the men. Only at the beginning of the 20th century it became a feminine color. This “gender change” occurred because of Elsa Schiaparelli and her creation of the iconic Shocking Pink.
Studies reveal that red is the most attractive colour to both men and women but, curiously, the two genders are attracted to the same colour for different reasons.
Given the above, red, black, and copper/bronze would seem to head the list of the most sexually attractive colours. Research shows that colour affects shopping habits. Red-orange, black, and royal blue attracts impulse buyers. Pink, light green, light and navy blue attract tight budget shoppers.
Gender-neutral colours like yellow, white, brown, green and orange are great choices for boys and girls alike. Even better, all of these colours can be paired with various shades of blue or pink if desired.
There are plenty of blue-eyed Asians. This probably happens when the traditional blue-eyed allele comes into a family from a (possibly very distant) European ancestor. Blue eyes then resurface in a child generations later if they inherit the allele from both parents.
Some people think that black eyes are one of the rarest eye colors. Have you ever seen someone with eyes that seem black as night? Although they appear black, they are really just a very, very dark brown, which is caused by an abundance of melanin.
Blue: Blue is the color of trust, confidence, and intelligence. Blue encourages intellectual activity, reasoning and logical thinking, and acquires lessons faster. That is the color of intellect.
Red is the most powerful color amongst all. It has a tendency to stimulate mind and attract attention.
Blue: Intellectual
Blue is a soothing color, helping calm the mind and aid concentration. It's no wonder then that blue is a popular color to use in office spaces. It enhances wakefulness and supports clear communication.
Of those four, green is the rarest. It shows up in about 9% of Americans but only 2% of the world's population. Hazel/amber is the next rarest of these.
Did Elizabeth Taylor have violet eyes? These days, thanks to colored contact lenses, anyone can have violet-colored eyes . Taylor didn't come by her purple peepers that way; the first tinted contact lenses weren't commercially available until 1983. Taylor's eye color was the real deal.
Likewise, two brown-eyed parents can have a child with blue eyes, although this is also uncommon.
A couple of years ago, scientist determined that BLUE EYES was a MUTATION that occurred around 6,000 years ago and it stems from A BLACK MALE AFRICAN ORIGIN. They report several archeological proofs puts this event around the BLACK SEA AREA.
Blond hair has also developed in other populations, although it is usually not as common, and can be found among natives of the Solomon Islands, Vanuatu and Fiji, among the Berbers of North Africa, and among some Asians.
Many Asians have naturally straight hair, but there is a significant group of us who do have naturally curly or wavy hair! However, because it's the norm to see straight and sleek hair, curly haired boys and girls tend to think that their hair is some kind of unruly straight hair that isn't behaving.
Is purple a “girl color” or “boy color?” Purple is traditionally a “girl” color. In fact, women often pick purple as their favorite color while only a tiny percentage of men do. It makes sense then, that purple is seen in women's attire all the time, yet is practically non-existent in men's clothing.
Since at least the 19th century, the colors pink and blue have been used as gender signifiers, particularly for infants and young children. The current tradition in the United States (and an unknown number of other countries) is "pink for girls, blue for boys".
Pink color is associated today with the feminine world, however, until 1920s, was a masculine color. Before this decade, the indicated colour for girls was white or blue.