But the A is what makes it so awesome, especially for digital artists.Ī in RGBA stands for the alpha channel, which is an additional channel that stores the information about the opacity/transparency of every pixel. Now, RGBA is seemingly close to that definition – to begin with, the three primary color channels are the same – Red, Green, and Blue. The math behind this number is fairly simple – each channel has 256 levels (from 0 to 255) so to get the ultimate range of shades we multiply them all – 256 x 256 x 256. If you try out different combinations of these three channels – R, G, and B – you will get as many as 16,777,216 different shades. As you might have guessed, (0 0 0) will give you the blackest black, and (255 255 255) is pure white. The values in the RGB model range between 0 and 255, where 0 stands for no representation of a color channel in the mix and 255 means the color channel is at its full power.įor instance, if you set your RGB color values to (255 0 0) you will get a vibrant red, with (0 255 0) you will end up with a bright green-screen shade of green and if you type in (0 0 255) you will see an electric blue shade. RGB stands for Red, Green, and Blue, and it is an additive color model which means that with RGB, you get a variety of colors by mixing different amounts of red, green, and blue. We are going to focus on RGB and RGBA even though there are more color models out there, including CMYK, HEX, HSV, and some others. To understand what an alpha channel is (and what it is not because there are some misleading definitions you might have seen), we have to talk about color models first.
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