What is RGB color model?
{{merge|RGB}} The '''RGB color model''' is an additive [[color model]]. In this model red, green and blue are added together to form a new color. An RGB color can be made by shining three colored lights of red, green, and blue onto a white wall in a dark room. Each light has a dimmer (to regulate its intensity.) [[File:RGB illumination.jpg|thumb|A representation of additive color mixing. Projection of [[primary color]] lights on a white screen shows secondary colors where two overlap; the combination of all three of red, green, and blue in equal intensities makes white.]] If only the red light is on, the wall will be red. If only the green light is on, the wall will look green. If the red and green lights are on together, the wall will look yellow. Dim the red light and the wall will become more of a yellow-green. Each setting of the three dimmers will produce a different result, either in color or in brightness or both. The set of all possible results is the [[gamut]]. Swap the red lamp for one of a different brand that is slightly more orange, and there will be a slightly different gamut, since the set of all colors that can be produced with the three lights will be changed. ==Details== The name of the model comes from the initials of the three [[primary colors]], red, green, and blue. The purpose of the RGB color model is for capturing, storing, and displaying images in digital electronic devices, such as [[Digital camera|photo cameras]], [[Television|television sets]], [[video camera]]s and [[Personal computer|computers]]. Before the electronic age, the RGB color model already had a solid theory behind it, based in [[Trichromacy|human perception of colors]]. [[File:AdditiveColor.svg|thumb|Additive color mixing: adding red to green gives yellow; adding green to blue gives cyan; adding blue to red gives magenta; adding all three primary colors together gives white.]] The '''RGB color model''' is an additive [[color model]] in which [[red]], [[green]], and [[blue]] light are added together in various w