Hey there,
There are definitely some strains that turn purple, but whether you can achieve that consistently, ideally with all trichomes being red, I can't say. You can promote it alongside the choice of strain by using other "stressors." Ice water, increased UV exposure, or over-lighting can make more red trichomes visible for UV protection.
But does that really work for a whole lady? I only know it to happen in spots...
Good luck bro✌️