This is a more recent and hopefully better quality picture. I think you can see the change in colour better in this picture

There is a visible line where the colour becomes more vibrant. Looking at the beak its a hen but I don't think it will be viable. Seems to be more aggressive than the other hen and neither male will give her the time of day. Just have to keep an eye on it.
First time keeping Gouldians so it's all new to me.