The red stand for blood.
Color blindness is the failure of the red sensitive nerves in the eye that don't respond to light properly.
red
The color red is known to evoke the fastest reaction in humans.
Because in the visible-to-humans-(who call red, "red")-portion of the electromagnetic spectrum, the particular wavelength whose wavelength matches the wavelength of the color red looks red in color to the humans who call red "red" and not just a feeling. Red isn't even a feeling. What are you talking about?
color blindnessRed/ Green color blindness.
color blindness
Very dark red
An autosomal recessive trait
Cones respond to color .
2 parents with brown hair can produce a child with red hair
Yes they are color blind
Two parents with brown hair can produce a child with red hair