https://dynomight.net/img/colors/generate.html?inside=0000ff&outside=ffcb13&size=400&countdown=60&shrink=30&mode=shrink https://dynomight.net/img/colors/generat

https://dynomight.net/img/colors/generate.html?inside=0000ff&outside=ffcb13&size=400&countdown=60&shrink=30&mode=shrink https://dynomight.net/img/colors/generate.html?inside=0000ff... is the one I was using. https://dynomight.net/img/colors/generate.html?inside=0000ff&outside=ffff00&size=400&countdown=60&shrink=30&mode=shrink https://dynomight.net/img/colors/generate.html?inside=0000ff... was suggested by another commenter. But as I mentioned in a parallel thread, I think the effect is caused by an imperfect optical path. Without my contacts in, there's no purple ring.