Colourpin is a free app for iOS devices that allows you to create and explore colors. The app can be used to determine the color of any surface or material, including paints, metals, ceramics, stones, wood, fabric, leather, and glass. The app provides the most accurate and reliable results by using a spectrophotometer to measure the light absorption of the sample.

The color spectrum of any material is determined by measuring the light that is reflected by the material. The more the material reflects light, the more its color is close to the spectrum of the light that is emitted by the sun.