Suggestion/complaint - Nutrition Graphs

The basic nutrition graphs show protein, carbs and fat. However, even though the bar graph and the pie chart use the exact same set of colors, they are assigned to different things. eg. purple is fats on one, but is protein on the other.

Is there a reason for this that I am missong, or would it be possible to make the color representations consistent?

my apologies if I have brought up and old/dead issue.