Two sorts of errors but both marked in red on tutorial

Feature Requests
#1

If I"ve figured this out right, there are two possible types of errors::


1.  coloring in image as the neuron that is not the neuron
2.  failing to color in image as the neuron that is the neuron

And the tutorial marked both errors in red.  It would have been easier to learn from if they had been marked in different colors.
#2

A few weeks ago, we debated about whether to mark both types of errors in the same color or different colors.  We will reconsider based on your feedback.

#3

agree. It would be easier to learn if they were a similar, but different, color (or shade of the same color)