Hey King,
it was also due to the fact that the blue was difficult to obtain. It had to be specially made from various resources. The nobility also loved the blue, as it was royal and the kings adorned themselves with the most beautiful purple blue. Therefore rare and expensive. Especially for warships in the 16th to the early 18th century, warships of the 1st rank were particularly expensively decorated. The reason for this was to show the enemy how rich and powerful the opposing king was so that he could afford such a ship. I was in Stockholm and had a look at the Vasa. It is impressive. If you like, I can post pictures here in your build report.
Best regards
Günther
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