Maybe if you examine the hex codes, but what if it’s paint? And what do you call that color in the middle? Is it green? Or red? Or neither? Something in between? What if the lighting conditions mess with it?

Species aren’t measured digitally, so the metaphor isn’t perfect, but I hope you can see what I mean by it. My bigger point is that speciation happens on a population level, not an individual level. Parents don’t have children of a different species. Populations evolve into different species.