Hi, she looks fine to me! It could be the illusion of the "lime" green new growth coming through compared to the left one, if you look, she doesn't look as dense as the on on the left, meaning more lighter coloured new growth is visible and diluting the overall appeared of her colour. If you look at her established leaves, they are all looking lush and healthy, personally I don't think you need to worry, keep up the good work, happy growing 👍