After looking at various colour palettes on Pinterest, I chose this one as a starting point.
The paper I intended to paint on is ivory coloured, so I planned my gouache palette on a sample of that paper using Winsor & Newton paint. I wanted a slightly lighter blue and a greener green. I also changed the pink and ochre, which I felt needed to be a little darker on the ivory paper. I mixed the paints from Prussian Blue, Spectrum Red, Gold Ochre, Spectrum Yellow, and Sap Green, plus Zinc White and Titanium White.
I like this colour combination for my folk art bouquet.