The palette
A great deal of water here, and in two very different kinds: the broad soft flat of the lough, and the hard rectangles of the basins. That is a gift, because one palette gives you both a landscape and a geometry. Choose a water tone strong enough for the basins to read as separate shapes rather than merging into the quays. Green settles on the western hills and in the river valley to the south: keep it light, so that water stays the main business of this print.