While I’m not usually one to perform extensive color modifications during post processing, due to the ROYGBIV challenge my wife and I have undertaken (discussed here), I had to come up with something indigo. And frankly, I was totally stumped, but liked this shot I took while making dinner. So, after a bit of selective color updating, I think I have something somewhat indigo.
As a side note, indigo is a bit of an odd color for web display. As Wikipedia discusses, the best RGB approximation is basically violet, with some blue. So I guess my difficulty in differentiating between indigo and violet really is understandable!