Change one pigment only

I still don't know if this will be about the light or about the leaves! My heart says the leaves, my head says the light!

But let's worry about one thing at a time! Change one variable at a time - another lesson from Uma Kelkar!

So, I'm leaving Turquoise blue behind. Replacing it with Cobalt Cerulean (PB36 - Schmincke). Why? Just because I was curious about this colour that I got on impulse with a voucher!