Some information about neutral and monochromatic colours along with an explanation of printmaking papers.
I use Stonehenge paper almost exclusively for my work, both my gel printing and on my press, but there are many other types of paper suitable for printmaking. Check out this website:
https://www.jacksonsart.com/blog/2021/07/06/everything-you-need-to-know-about-printmaking-paper/
The first two links refer to monochromatic and neutral colours and are related to interior decorating but they provide useful information to artists:
https://www.thespruce.com/what-is-a-moochromatic-color-scheme-1973826
https://www.benjaminmoore.com/en-us/color-overview/color-insights/monochromatic-color-schemes
And, from Golden Artist Colors, the following information on mixing neutrals using complementary colours (as we do in this project) or by toning with white, black or gray:
https://www.justpaint.org/neutralizing-color/
And this from NovaColor, a great comprehensive article about colour including some info about mixing and neutrals:
https://novacolorpaint.com/en-ca/blogs/nova-color/mix-colors-for-acrylic-painting