Thank you for your comment, this piece doesn't get much love usually
And I couldn't agree more. I do like the look of monochrone, but it works better if you add a few contrasting colors. I'm not gonna revisit this particular infographic anymore, but it's something I'll bear in mind in future works.
I actually don't really have a good answer for that. Choosing the color itself was a conscious choice (because it's commonly associated with authority, security and professionalism among other things), and I did try to make it as visually consistent as possible. But it turning out monochromatic... is just sort of how it turned out