Original sentence: They come in eight diffrent colours: red, orange, yellow, green, blue, violet, pink and brown, although the blue variety was temporarily replaced by a white variety in some countries, while an alternative natural colouring dye of the blue colour was being researched
Edited sentence: They come in eight colours: red, orange, yellow, green, blue, violet, pink and brown, although the blue variety was temporarily replaced by a white variety in some countries, while an alternative natural colouring dye of the blue colour was being researched