oh, interesting question. I should have elaborated on my tools at hand a little more.
To do the color matches, I actually used a good old-fashioned Pantone chip book with individual Pantone colors. I then converted the Pantone colors I chose to rgb colors with an online color converter: https://www.studiored.com/rgb-hex-to-pantone-color-converter/.
Once I had the rgb values, I set up my color palette graphics in Adobe Illustrator. I also set up the color overlay dots on the photos in Adobe Illustrator.
For minor retouching on the photos, I used Adobe Photoshop.
I'm a bit of an old-fashioned designer. I still like to do a lot with the Adobe programs where I can control composition and set-up. (I'm not a big fan of pre-set filters etc).
I will write a follow-up story on the tools I used and how to move fluently from color-space to color-space.
Thanks for your great question!