On 3rd of July 1928 John Logie Baird demonstrated the world’s first colour transmission.

using scanning discs at the transmitting and receiving ends with three spirals of apertures, each spiral with a filter of a different primary colour; and three light sources at the receiving end, with a commutator to alternate their illumination. The demonstration was of a young girl, 8-year-old Noele Gordon, wearing different coloured hats. Miss Gordon went on to become a successful TV actress, famous for the soap opera Crossroads. That same year he also demonstrated stereoscopic television.

Wikipedia

John Logie Baird (1888-1946) was born in Helensburgh. He invented the first working television. Scottish Science Hall of Fame

He inspired many young inventors and engineers including in Orkney Jack and Jimmy Twatt: Seeing By Wireless: Orkney’s First Televisions