It is too dark now to take pictures and have any color accuracy, so you’re just going to have to take my word for it…
I wound up the next (fifth) ball, the one with the beginning that closely matches the end of the knotted (third) ball. The outside, which is now the end, is nicely purple. While I had the ball-winder going, and since I’m so close to needing it anyway, I wound up the last (sixth) ball. Amazingly, its beginning end also matches the end of the knotted (third) ball!
The nicely purple end of the fifth ball goes fairly well with the nicely purple end of the fourth ball… so I’m going to re-wind the fifth ball so that the purple end is now the purple beginning. I can’t believe how well this is working out, considering how randomly I picked these balls of yarn!
I proofread this before posting to make sure I had all the balls of yarn right. Hopefully it’s not too confusing, and you can follow along. I’ll try to get color-accurate pictures when there’s some daylight!