Living in the caves is strange, after so many years on planets where the colours are so different. It is dark in the caves and the absence of colour is strange from the other planets where different colours had been seen from different eyes.
No matter how much it unsettles her, she puts up with it, because Jamie and Jared and Ian and Jeb are here and she's found herself strangely attached to all of them, even if that feeling isn't necessarily reciprocated.
She realises that she isn't really living in the dark, but standing in the light. It's lighter than she's ever seen before.