dutch passion purple #1 all turned deep dark purple after drying, but they all hermied on me too...
other good purple colored strains, that are 100% purple at the end would be:
Dutch Passion Frisian Due
Dutch Passion Twilight
Paradise Seeds Sweet Purple
other good purple strains that arent all purple, but really great smoke would be:
TGA Querkle
TGA Qrazy Train
Reserva Privada Purple Wreck
And if you live in a place were you can buy clones, good ones to get would be:
Purple Urkle
Mendo Purps
Other than the clone only strains, ive grown the rest while on a purple binge... Good stuff, but there are far superior genetics out there. If your friends are only looking for purple stuff, you could make whatever you are growing turn purple... check out some of the nutrient deficiencies out there, and also research colder temps at night in your grow room. I hope I helped, peace.