The first version of ColorOS was launched in September 2013. Oppo had released plenty of Android smartphones before then. It was not stock Android, but Oppo did not label it as ColorOS. Over the years, Oppo launched new official versions of the operating system. To make things less confusing, in 2020 the company revealed that it would adept the same numbering scheme as mainline Android, such as ColorOS jumped from ColorOS7 to ColorOS 11.
