Which leaves us with "RGB".īy far the most widely used color mode in the world of computers and technology is the "RGB" color mode.
#COLOR RGB 255 255 255 PROFESSIONAL#
The "Grayscale" mode, as I mentioned, is strickly used for black and white images, and the "Lab" mode is beyond the understanding of most people on the planet, as well as a few people on other planets, although it is often used for professional image editing, but even then, most people who use it have no idea how it really works. The "CMYK" mode deals with printing and ink and is a whole other topic for another day. Of these four that I've mentioned, the one we're going to be looking at here is the first one, RGB. It's strickly a black and white mode, and is often used to quickly convert a color image into black and white. These are all examples of color modes, and they determine how Photoshop translates its black and white information into color, with the exception of the "Grayscale" color mode, which doesn't use color at all. A couple of others you may have heard of while working in Photoshop are Grayscale and Lab (pronounced "L-a-b", not "Lab"). There's quite a few different color modes out there, but the two main ones are RGB and CMYK. Depends on what, you ask? It depends on which color mode Photoshop is using. So how does it take those blacks, whites and grays and translate them into the colors we see on our screen? The answer is, it depends. We know, or at least we'll willing to go along with the idea for the moment, that Photoshop doesn't see color. They're both related to each other in a big way, so once you understand the first one, color modes, the second one, color channels, makes a lot more sense. One is color modes and the other is color channels. To answer that question, we need to look at a couple of things. The whole thing is in color! And this image is open in Photoshop, so how can it be that Photoshop doesn't see color? And if it really doesn't see color, how is Photoshop doing such a great job of showing us something it doesn't see? The piece of wood the bird is standing on is in color. The leaves in the background are in color. In fact, I don't think birds come much more colorful than this. Obviously, this little guy (or girl) is in color. To it, life just couldn't be sweeter than in black, white and gray.ĭownload this tutorial as a print-ready PDF!Īlright, so if Photoshop doesn't have a clue what color is, and all it knows and sees is black, white and gray, how does it manage to show our images in color? I mean, here's an image I have open in Photoshop:Īn photo open in a document window in Photoshop. We wouldn't know what to think if everything was appearing in black and white. In fact, the only reason it shows us our images in color at all is because we as human beings expect to see them in color. It's perfectly happy in its colorless world.
And that famous pot of gold at the end of it? To Photoshop, it's a big ol' pot of gray.ĭon't feel sorry for Photoshop though. Did you manage to snap a picture of a rainbow arching across the sky after a summer evening storm? Photoshop sees it as a beautiful assortment of shades of gray. You may be looking at a photo you took on your last vacation of the crystal blue waters on the ocean, but all Photoshop sees is a gray ocean. The world's most powerful image editor, an industry standard among photographers, designers, and virtually all creative professionals, capable of producing millions, even billions of colors, has no idea what color is. Well, black, white, and a lot of shades of gray in between, but that's it. I mean it's completely and totally blind when it comes to color. RGBA color values.Did you know that Photoshop is color blind? When I say "color blind", I don't mean it has a little trouble distinguishing between certain shades of green and purple. RGBA values must not be treated as simply an RGB value with the opacity ignored.ĬSS Color defines the RGBA color values in 4.2.2. If RGBA values are not supported by a user agent, they should be treated like unrecognized values per the CSS forward compatibility parsing rules (, Chapter 4).The format of an RGBA value in the functional notation is ‘rgba(’ followed by a comma-separated list of three numerical values (three percentage values), followed by an, followed by ‘)’. The format of an RGBA value in the functional notation is ‘rgba(’ followed by a comma-separated list of three numerical values (three integer values), followed by an, followed by ‘)’. The RGB color model is extended in this specification to include “alpha” to allow specification of the opacity of a color.
0 kommentar(er)
