Image Corruption

by Andy Tockman

This puzzle has colorblind-unfriendly elements. We apologize; here is a text version of the image in this puzzle.

Oh no! Your graphics designer was working on a fantastic image demonstrating the beautiful pictures you can create by combining just three primary colors, but their computer crashed and all their hard work was lost! All that's left is this corrupted image:

They appear pale, their face drained of color, as they walk away from the computer in resignation, but you notice some notes they had scribbled and left behind:

7
3
9
1
5
10
6 4
2
8

It seems like all is lost, but you think you can at least figure out how they could have avoided this. What could prevent a similar disaster from happening in the future?

Here's a larger version of the image, for your convenience: