be damn careful because koolaid can also dye your counter tops. I have 1 blue spot and a purple spot from my first batches cause i wasnt paying close enough attention. I used the koolaid and microwave technique, follow instructions its super easy
the blue hackle is what i dyed same with the purple. I actually have several other colours that i had bought already because i use them for other flies also (like red and orange) i played around trying to get a hot pink but koolaid doesnt work good enough so you may want to look into using RIT dye instead. RIT is also good for other colours ive been told but it WILL stain things very easily