Question

In Coral Code

Summary: Given integer values for red, green, and blue, subtract the gray from each value.

Computers represent color by combining the sub-colors red, green, and blue (rgb). Each sub-color's value can range from 0 to 255. Thus (255, 0, 0) is bright red, (130, 0, 130) is a medium purple, (0, 0, 0) is black, (255, 255, 255) is white, and (40, 40, 40) is a dark gray. (130, 50, 130) is a faded purple, due to the (50, 50, 50) gray part. (In other words, equal amounts of red, green, blue yield gray).

Given values for red, green, and blue, remove the gray part.

Ex: If the input is:

130 50 130
the output is:

80 0 80
Hint: Find the smallest value, and then subtract it from all three values, thus removing the gray.

Answer 1

This program manipulates RGB color values in order to remove the gray component. Gray is determined by equal parts red, green, and blue, which results in a lack of color (and a shade of gray). To remove the gray, the program finds the smallest value among the three colors and subtracts it from all three values. This has the effect of shifting the color towards its pure form, removing the gray component.