I am working in watercolours at the moment. I have a friend who works in oils.
We were having a conversation the other evening and it was clear we were seeing things quite differently.
This was why.
When painting in oils, one usually applies the darks first, and then moves into increasingly lighter colours. Dark to light.
However when painting with watercolours, the shapes are begun with pale washes. The darks are applied progressively afterwards. Light to dark.