There are wide application of colour models that are-

1)RGB Colour model used in computer graphics image processing, image analysis,and in image storage.

2)CMY model used in printing.

3)HSV and HSL used in human visual perceptions,computer graphics processing, computer vision, face recognition,image analysis, image design ,image editing softwares, video editors etc.

4)And YIQ colour models are used in television broadcasting systems and video systems.