>>149720696
Yes, you can technically color pick the colors and use them.
But there is more to the perception of color than just the correct RGB code.
Just look at picrel.
I used a magic wand tool to select the colored parts, color picked a random pixel inside the selection, and then used a fill tool to fill the entire selection with the same flat color.
Maybe you notice that some subtle color gradients like that on the markings on her cheeks are gone.
Or that the picture, even though it's almost identical. has a more flat look.
And these differences are more than just adding a grain filter.
If the line work also had almost always the same thickness, then it would look even more artificial.
You can literally see, that the original image was drawn by a human with paint.