Brown is no more dark yellow than it is dark blue, green, or any other color!  

  Brown is a color formed by the incremental inclusion of that colors compliment. An example of that would be blue and a little orange mixed in to produce a type of brown, yellow and a little bit of purple tp produce another shade of brown. Using subtractive color methods. So a little bit of color theory for those who don't know. There are primary colors, yellow, blue, red, Secondary colors purple, orange, green, and some tertiary colors are recognized in color theory but at that point its just levels of graduation between these "pure colors" on the color spectrum. Why are we calling these pure colors? Because they are on the visible part of the electromagnetic spectrum. If you dont know what that is, Google it because the rest of what I'm about to say won't make sense. So brown is basically what happens when the eye sees a blended combination of wavelengths that fall anywhere on the spectrum with roughly more than 100nm (nanometers) difference in length.


 

So call it what ever you want but BROWN IS NOT DARK YELLOW.


I minored in biology with a focus on perception and vision science as an undergrad and given my best guess on why there is no "dark yellow", I would say it probably has specifically to do with the frequency at which cones in the human eye respond to 'color' wavelengths. The normal human eye has a set of three types of cone shaped 'color' light responsive nerves. Most people have heard of them. If you are missing one or more of these types you are considered color blind. What is interesting about the sensitivity of these cones is they are not evenly spaced out on the visible light portion of the electromagnetic spectrum nor are they evenly sensitive to their particular wave length, and there is no cone that responds to activity in the yellow part of the wave length spectrum. There is a cone that responds to blue (400 nanometers long) and red and green (600-700nm range) So the eye is always just guessing at what it yellow. If you want more info about this kind of 'perceptual guessing' Google cone sensitivity curve. Its fascinating.


I hope that helps. :)

Brown is no more dark yellow than it is dark blue, green, or any other color! 

Brown is a color formed by the incremental inclusion of that color's compliment. For example: blue with a little orange mixed in to produce a type of brown, or yellow with a little bit of purple to produce another shade of brown.

This is using subtractive color methods.... so, a little bit of color theory for those who don't know. There are primary colors: yellow, blue, red; secondary colors purple, orange, green; and some tertiary colors are recognized in color theory but at that point its just levels of graduation between these "pure colors" on the color spectrum. Why are we calling these "pure" colors? Because they are on the visible part of the electromagnetic spectrum. If you don't know what that is, Google it because the rest of what I'm about to say won't make sense. 

So, brown is basically what happens when the eye sees a blended combination of wavelengths that fall anywhere on the spectrum with roughly more than 100nm (nanometers) difference in length.

So call it what ever you want, but brown is not dark yellow.

I minored in biology with a focus on perception and vision science as an undergrad, and given my best guess on why there is no "dark yellow", I would say it probably has specifically to do with the frequency at which cones in the human eye respond to 'color' wavelengths. The normal human eye has a set of three types of cone shaped 'color' light responsive nerves. (Most people have heard of them.) If you are missing one or more of these types, you are considered color blind. What is interesting about the sensitivity of these cones is: they are not evenly spaced out on the visible light portion of the electromagnetic spectrum, nor are they evenly sensitive to their particular wave length, and there is no cone that responds to activity in the yellow part of the wave length spectrum. There is a cone that responds to blue (400 nanometers long) and to red and green (600-700nm range) So, the eye is always just guessing at what is yellow. If you want more info about this kind of 'perceptual guessing' Google "cone sensitivity curve". It's fascinating.

I hope that helps.