Invert doesn't quite function as you'd expect to to in comparison to normally inverting an image. Instead, whilst structures are left intact, the colours of the image are drastically changed. Once again the most reactive colours are green and yellow which changed into teal and purple respectively. Red and blue on the other hand have been mostly converted to grey with slight fringing on the edges of lines. Darker sections have been lightened and vice versa, however not to their opposite state. The gradient has also been split into two, suggesting that the algorithm for determining colour analyses and calculates colour in its own way.