I did go back to change the colour of my work to make it black and white so it became more of a tonal study, though I find it hard to work with blacks and greys using a filter seemed like a cheating way out so the next I attempt this challenge I will use tonal instead of applying a filter, on some I can see that some of the thumbnails were easily read compared to the tonal versions. It was important for me to try this out so I can be aware of how colour changed a scene and if it is still readable when translated to black and white.