It will be my pleasure, Miss Hazel.
Since this is a Christmas thread, consider this to be an early Christmas present from me to you (and I guess to everyone else who sees this as well! lol):
For the purple swirl, I used 1/2 cup of soap batter (it was a small 1.2 lb. sample batch, afterall), and equal amounts of BB's Fired up Fuschia and BB's Ultra Violet Blue (1/8 tsp. each), plus 1/32 tsp. of BB's bamboo charcoal to deepen it a little.
If you have a set of those little measuring spoons that measures in dashes, pinches and smidgens, it translates to 1 dash each of the Fuschia and UV Blue, and one smidgen of the charcoal.
I mixed the colorants up beforehand in a little prep bowl with some glycerin before adding to my 1/2 cup of swirling batter.
For bigger batches, keep to the same ratios of color to batter, just increase the amounts accordingly.
Merry Early Christmas!
IrishLass
Edited to add: Oh, by the way, I didn't intentionally do a secret feather swirl. It just happened to come out looking that way. It was actually my rendition of what I like to call an Ione hanger swirl (name after the soaper who inspired it).