What themes are highlighted by the watercolor aesthetic in the wild robot?

The only source supplied discusses Studio Ghibli, its founders, and notable works such as My Neighbor Totoro and Princess Mononoke. It does not mention The Wild Robot, its artistic style, or thematic content. Therefore, based on the evidence available, I cannot determine which themes the watercolor aesthetic might highlight in The Wild Robot. If you need an analysis, I recommend consulting sources that specifically cover that film or its artistic techniques.