Here are three collages for a lesson in Jane Davies' color online class. The first is the monochrome:
I used green blue and blue in this, as well as black and white, and the partly hidden letters are blue neutralized with orange. Mostly paint with a bit of cut paper and some doodling with watercolor crayon.
Here's an analogous piece:
This started with a green blue background and then a green and yellow green island appeared. All paint. I think I'll add some even lighter tints to the 'island' although this isn't as dark in real life as it appears.
And here's a complementary collage. I had a hard time finishing this one. The pinkish circles were bright red violet to start but that seemed too intense (even for me) so I knocked them back and now…they need something. Texture? Fine detail? So this is probably NOT finished!