We use below tools or tests to check color vision deficiency.
Red is the primary color of the light spectrum, located between orange in the shorter wavelength range and infrared in the longer wavelength range. The human eye is thought to perceive light with a wavelength in the range of 620-750 nm (625-760 nm) as red.
It is one of the three primary colors in the additive scheme (RGB) of color formation along with blue and green. It is one of the three in the subtractive scheme, along with yellow and blue.
Red light is used for lighting in chemical photography when processing photographic film and photographic paper, as they are generally not sensitive to it. Red lasers are used in home DVD players and DVD-ROM drives.
The invention of red lasers with a sufficiently short wavelength makes it possible to create the DVD format with all its variants: DVD-R, DVD+RW, DVD-RAM, etc.
We associate the color red mainly with fire, heat, energy and the color of blood. In the field of emotions, we identify it mostly with love, passion and rage.
Red is the main color of the warm tones in the fine arts. Additional colors such as purple are displayed in red – in combination with blue, orange – in combination with yellow, pink – in combination with white.
Green is the main color of the white sunlight, located between blue and yellow in the rainbow, recognizable by humans mainly in plants.
It is a transitional color between cold and warm tones in fine arts. Green is a secondary color – a combination of blue and yellow, similar to colors such as orange and purple.
Blue is the main color of the spectrum of white light, located between violet, in the shorter wavelength region of the spectrum and green – in the longer wavelength. It is believed that the human eye perceives light with a wavelength between 450 – 495 nm (440 and 490 nm) as blue.
Blue is one of the three primary colors, along with red and green, in the additive (RGB) color scheme. Color TV tubes and computer monitors work according to this scheme. Blue is also one of the three primary colors in the subtractive color scheme (along with red and yellow).
Blue is present in the rainbow, it is recognizable by man mainly in the color of the sky and the sea.
It is the main color in the cold tones in the fine arts. Here are some shades of the blue: ultramarine, azurite, cobalt blue, Turkish blue, blue-green (cyan). Blue produces colors such as green in combination with yellow and purple in combination with red.
In psychology it is associated with harmony, calm, security, hope, infinity, distance, peace, purity, trust, confidence, piety, technology, optimism, coldness, coolness, melancholy.
We use below tools or tests to check color vision deficiency.
