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In this manner, what color should orchid leaves be?
green
Additionally, what purple leaves mean?
When you notice a plant with purple leaves rather than the normal green color, it is most likely due to a phosphorus deficiency. The underside of marigold and tomato plant leaves will turn purple with too little phosphorus while other plants will be stunted or turn a dull dark-green color.
Dehydration is the cause of leaf tips turning brown and drying out before the entire leaf dies. Sometimes increasing watering to two or three times a week cures the problem, but other times the dehydration is a sign that the roots have ceased functioning and absorbing water.