Cambridge Blue (colour) of R 163, G 193, B 173. This colour is actually a medium tone of spring green. Spring green colours are colours with an h code (hue code) of between 135 and 165; this colour has an h code of 140, putting it within the range of spring green colours on the . The other (less traditional) colours selected for the house style are Pantone 285 (blue), 158 (orange), 369 (green), 513 (purple) and 7466 (teal). Pantone 032 (red) and 109 (yellow) feature in the official University coat of arms. The jerseys of the NSW Waratahs have been Cambridge Blue
E series of preferred numbers based on some of these existing conventions, the International Electrotechnical Commission (IEC) began work on an international standard in 1948. The first version of this IEC Publication 63 (IEC 63) was released in 1952. Later, IEC 63 was revised, amended, and renamed into the current version known as IEC 60063:2015. IEC 60063 release history: The E series of preferred numbers were chosen such that when a component is manufactured that it will end up in a range of roughly equally spaced values on a logarithmic scale. Each E series subdivides the interval from 1 to 10 (decade) into steps of