The Pantone Color Matching System is largely a standardised color reproduction system. By standardising the colors, different manufacturers in different locations can all refer to the Pantone system to make sure colors match without direct contact with one another.
Pantone colors are described by their allocated number (PMS 130). PMS colors are almost always used in branding and have even found their way into government legislation (to describe the colors of flags).
The pantone colour for 2011 Honeysuckle Pantone 18-2120
The CMYK process is a method of printing color by using a variation of percentages of four inks—cyan, magenta, yellow, and black. A majority of the world’s printed material is produced using the CMYK process.
The RGB process is an additive color model in which Red, Green, and Blue light is added together in various ways to reproduce a broad array of colors. Like CMYK the name of the model comes from the initials of the three additive primary colors, red, green, and blue. The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers.