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CMYK stands for cyan magenta yellow and blacK and is a color system used in the offset printing of full-color documents.
Offset uses cyan, magenta, yellow, and black inks and is often referred to as “four-color” printing. Monitors use red, green, and blue light instead, so they display images using a different color system called RGB. One of the great problems of the digital age has been matching colors between these two systems; i.e., taking a digital RGB image and making it look the same in print using CMYK. These problems are addressed by applications such as the Pantone Matching System.
For example, in a normal array, you’d have:
dinner = "monkey brain";
dinner = "meatloaf";
But in a hash, you could use a string as the index:
dinner["monday"] = "monkey brain";
dinner["tuesday"] = "meatloaf";
If you’re at all interested in e-biz, you’d better get serious about tracking webographics. A user’s webographic profile includes platform (Mac, Unix, or Windows), browser make (IE, Netscape) and model (3.0, 4.0), and connection speed (T1, 28.8, 14.4). Each of these factors can have a dramatic effect on a user’s experience, and every developer must decide whether to build a site that’s accessible to everyone (meaning fancy cutting-edge doodads are out) or create something really cool that won’t work unless users upgrade. We, of course, recommend the former.
The Pantone Matching System (PMS) is a popular system for printing inks. Often a printer has two choices for creating an ink color:process color and spot color. Process color uses a mixture of four specific colors – cyan, magenta, yellow, and black – to create the desired shade. Spot color uses a matching system to create the shade. By specifying the official Pantone name or number, you can be assured of the color match when the file is printed.