As you can see in the picture above, the color didn't quite work out. For comparison, here's the photo in the book:
I know the problem: it's the bitters. Angostura is intensely red. Mind you, she suggested 1-3 dashes and I really like Angostura so I went with 3. A single dash might not have had such a huge impact on the color. Even so, if I were to create my own version, I'd swap it out for a more green-complimentary bitters - grapefruit perhaps.
I also went with a weaker gin since it's what we had on hand. If I were to up the alcohol content (which my wife assured me is not necessary), I might swap out the Triple Sec for chartreuse. It would add alcohol and also support the color.