which colours are mixed in color magenta we use use in drawings
Answers
Explanation:
First of all, you can define any colors you want to be the "primary colors" of your color system, so that other colors are obtained by mixing the primary colors. Although there may be an infinite number of color systems, they are not all equally useful, practical, or effective. For instance, I am free to create a color system where I define light blue, medium blue, and violet as my primary colors. Even though I am free to define my primary colors as such, this color system is not very useful in general because no amount of mixing of these primary colors will produce red, orange, yellow, etc. Therefore, we should make a distinction between a color system and an effective color system. The effectiveness of a color system is best measured as the number of different colors that can be created by mixing the primary colors of the system. This set of colors is called the "color gamut" of the system. A color system with a large gamut is more able to effectively represent a wide variety of images containing different colors.
The most effective color systems are those that closely match the physical workings of the human eye, since it is ultimately the human eye which experiences the color. The human eye contains a curved array of light-sensing cells shaped like little cones and rods. Colored light is detected by the cone cells. The cone cells come in three varieties: red-detecting, green-detecting, and blue-detecting. They are so named because the red cone cells mostly detect red light, the green cone cells mostly detect green light, and the blue cone cells mostly detect blue light. Note that even though a red cone cell predominantly detects the color red, it can also detect a little bit of some other colors. Therefore, even though humans do not have yellow cone cells, we can still see yellow light when it triggers a red cone cell and a green cone cell. In this way, humans have a built-in color decoding mechanism which enables us to experience millions of colors, although we only have vision cells that predominantly see red, green, and blue. It should be obvious at this point that the most effective color systems are ones that closely match the human eye, i.e. color systems that mix red, green, and blue light.
There is a slight complication because there are really two main ways to create a light beam. We can either create the light directly using light sources or we can reflect white light off of a material that absorbs certain colors. A system that creates light directly is called an "additive" color system since the colors from the different light sources add together to give the final beam of light. Examples of additive color systems are computer screens. Each image pixel of a computer screen is just a small collection of light sources emitting different colors. If you display an image of a pumpkin on your computer screen, you have not really turned on any orange-emitting light sources in the screen. Rather, you have turned on tiny red-emitting light sources as well as tiny green-emitting light sources in the screen, and the red and green light add together to make orange.