While you have painted the model very nicely, I must say, I don't think that it fits with the base. The model you have is, for a WW I tank, quite clean and, in this configuration, would look best on a roadside prior to entering battle. Maybe at a railhead just coming off a train. Once the tank is in the field (literally) it would almost immediately be covered in mud/dirt. The ground colours you have used indicate a moist soil (not dusty dry, not wet mud). In this case the vehicle's tracks would have picked up and thrown over the entire tank appreciable amounts of dirt clods & grass sod. There would be dirt on all the tracks and dirt jammed into the sprocket openings in the sponson sides. It just looks out of place being as clean as it is.
On a separate note, the use of browns for the track colour, unless indicateing fresh dirt or mod, really isn't right. Track in use had a dark burnished steel colour and, even when going though moist dirt or mud, all exposed track surfaces will be burnished quite bright metal colour. The rust colour you have on your tracks are more representative of a vehlce that has been sittingfor a while, maybe a couple weeks, so that the steel has gone trhoug the initial bright rust phase and then into the longer-term browner rust colour.
This is not meant to slag you or anything, but to help you compose your vehicle on their bases better.
Paul