In Physics colour is linked particularly with electromagnetic radiation of a specific range of wavelengths seen for the human eye. The radiation of such wavelengths constitutes that percentage of the electromagnetic spectrum generally known as the noticeable spectrum—i.e., light. ArticleOpen Access24 Jul 2025 Micrometer-scale indirect photopatterning of RGB OLED emissive https://www.zigonglanterns.com/exterior-illumination-christmas/