I just did a "do-it-myself" home dye job with indigo on a Tigre Royal 90 silk. The original color was pink, gold, and white. It was an old scarf with stains, pulls, and a hole, so I got it at a very low price. I purchased it specifically for this "experiment", and didn't really care if it didn't turn out well, but I think it looks pretty good.
BEFORE
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AFTER - Those dark splotches are just shadows.
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Looks amazing!

I may get brave and try this one day.