I got up off my ass a searched a little and
this COULD be it. Obviously the auto translated subtitles aren't going to be correct, probably only roughly correct.
(I read some comments on the first part of the interview and there were originally English annotations from the uploader, that's why it says "Eng Sub" in the title. Unfortunately, YouTube killed those years ago, so we gotta use the auto generated subtitles for now.)
According roughly to the Zun. He was going to use Su* as her base color. But he wasn't sure, so it could have been Su or a little gray.
*No idea what color "Su" is, but that's what the subtitles put. Obviously if understand japanese more than me you can figure it out.