I wonder what style of shibori this is. After months of reading and planning and knowing my indigo dye and other supplies are arriving tomorrow, I'm going to put everything aside and research this method. This is the direction I want to go.
This may help explain what I mean by "tints". A pure state of colour is called hue. Tint is pure hue + white. Note that this does not mean the color has to be light/pastel, just that it has white/bright undertones.