RAL is a coding system to define colors, for example coating colors. The system was developed in 1927 in Germany and stands for ReichsAusschuss für Lieferbedingungen. The color definitions are the industry standard in many markets, such as construction and traffic safety.
The standard is managed by the Deutsches Institut für Gütesicherung und Kennzeichnung (German Institute for Quality Assurance and Identification). You can find more information about the RAL color system on Wikipedia.
The website RALcolorchart.com provides an overview of all classic RAL colors. The colors are divided into shades and visitors can search colors by color name or color code. RALcolorchart.com is an initiative of Whirlwind Internet.