Week 4-Deal with color on DrRocket

People all know that the three primary colors are red, green, and blue; however, I learned a different interpretation of colors on DrRocket. To make a color of an image, one should “define-struct color”-(red green blue alpha). The function of “alpha” is to make image smoother.

(define-struct colour (red blue green alpha))

(define col (make-color 200 200 100 255)

To check out the color of an image, we should also understand the function of “list”.

(color-list-> image)