Received via email:
Here is another photo of the Peninsula Hotel which shows up the wartime camouflage colours better. The roofs of the KCR Station also appear to be blotched and darker than normal.
Your linked wartime photo of Arthur Ball's set on Flickr also shows the Pen in camouflage colours immediately after the war. [In Arthur's photo you can see the Japanese had been busy with the camouflage paint. Even the clock tower has been given a coat. MrB]