The orchid looks good to me. A few phals have naturally occuring purple edges on the leaves and on a few of mine the entire under-side of the leaf is purple by nature. Others have purple edges when they get high light levels. I grow mine outdoors in Florida where they often get pretty high light. The edges of the leaves and the new leaves are often purple and some of mine have purple freckles on the leaves. It does indicate that the plant is being grown at the upper end of it's light level tolerance.
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