Excellent experiment. Now, I suggest, a follow up. If you have any of your older eggs (before you started the chili powder), I suggest that you do a "blind" taste test. cook some of your older yellow yolk eggs, and cook some of your orange yolk eggs. Then have blind folded volunteers taste them. See if there is a noticeable difference when visual input is removed from the gustatory experience. (forgive the big word. sometimes when I find one that fits, I just have to drag it out and play with it!!!)