These are called subtractive primary colors because mixing any combination of these will always produce a darker color. We now will post another graphic showing these 3 secondary colors, with their HTML hexadecimal codes. You probably noticed that mixing these three colors produces three additional colors (called secondary colors): You can see how this holds true by looking at the other 2 hexadecimal color codes. So that means this displayed color will have zero amounts of green and blue. Since "FF" is the largest 2 digit hexadecimal number, that means it will display the full amount of red. As we stated, the first 2 digits "FF" control the amount of red. Looking at the above graphic, we see the hexadecimal code for red is FF0000. The first 2 digits control how much red to display, the third and fourth digits are the amount of green and the fifth and sixth digits determine the amount of blue to display. Incidentally, in HTML, colors are displayed by using 6 digit hexadecimal (base 16) numbers. Because these are the primary colors of light, these 3 colors are used for televisions and computer monitors. These are called additive primary colors because they are the primary colors of light which explains why mixing any combination of these will always produce a brighter color. (along with their HTML hexadecimal codes). Pictured above is a graphic displaying red, lime and blue as the 3 primary colors However, in the 20th century, color theory was examined scientifically and the primary colors are now known to be red, green (actually lime or electric green ) and blue because their wavelengths are spread more evenly across the visible light spectrum. Actually that was based on a system that goes back centuries and even to this day, artists still use these as their primary colors. Perhaps you have learned in school that the three primary colors are red, yellow and blue. Go to Part 3 - Primary, Secondary, Tertiary, Quaternary and Quinary Colors The 3 Primary the 3 Secondary and the 6 Tertiary Colors
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