How do you care for blue mystique orchid?

The same way you care for any other phalaenopsis. Water from the bottom when it gets dry at least an inch from the to of the medium, fertilize lightly with an orchid fertilizer once or twice a month, don't let water get into the leaves at the top of the plant, and give it filtered light. but be aware, you'll probably get the due they used to make it blue in the water or on your hands at first, and within a blooming or two it will have white flowers.