both state width="400" height="300"> why is black so much larger than green? Am I missing something?

Answer 1

What do you mean? Can you post the code?

Answer 2

It doesn't matter at all how big they are in comparison to each other. The different sizes are two different examples used to demonstrate how changes in the values will change what the output is.

Answer 3

a color is only as big as the area you have given...