The pearlcatcher is ready to breed, and I'll have a nest open tomorrow. I already have a dragon that will produce hatchlings that are pretty close in color so I don't need to borrow any! Although if you'd prefer they had blue eyes instead of red, I could let you borrow them and hatch them in your nest
And if you want a lighter colored rainbow dragon, try getting an iridescent maize primary. Put this number (14258487) into the predict morphology section of the scrying workshop, then change from hatchling to dragon (since he's not fully grown yet, but should be tomorrow) if you want to see what it would look like