Hopefully that helps and didn't completely swamp your brain. I was getting a little dizzy re-reading it.
Primrose is a yellowish brown now. So I would call her (based on what the colors are described on the NASSA site) Mioget now fawn. She has gone very pale. She also is a pain to get a picture of as she will stare at you and as soon as you go to click she turns away or puts her head down.
Iris is an interesting one. She has lightened an incredible amount. She is facing the camera in this picture. Violet is the one facing away.
From what I have been told, Heather was as dark as Yin is when she was a lamb and she lightened up to what she is now. Which makes me think Emset would be the correct color for Heather. I also think she may be Krunet. She has the "sugar lips" but for some reason, it doesn't show up on the side shots. Here is another angle.
Now to look for a new ram for the girls my husband plans to keep. The plan is to sell one lamb from each of the twins and keep the other one. Yang will be wethered if we do not find a new herd for him. He is sweet and funny.