Here is my post for day 2 (July 8) - the debate over the color "Indigo".
https://steemit.com/colorchallenge/@steempowerpics/exactly-what-color-is-indigo-painted-tiger-lily-by-steempowerpics-colorchallenge-indigosaturday
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that was a fun, informative post. I agree with Isaac Asimov's assessment :)
Than you :-) Yeah it has always bugged me about it's inclusion in the "official rainbow" lineup.