Hmm, I'm trying to remember if there was a consistent color palette associated with them. Not really 'sparkly pastels,' that's for sure. The descriptions leaned into muted, natural, and sometimes sickly colors: the gray-green of lichen, the pallor of fungus, the deep black of stagnant water, the silver of old moonlight. Occasionally a flash of iridescence like oil on water or a beetle's shell. It's a color scheme of decay, twilight, and things that thrive in shadow. This visual coding immediately tells you these aren't benevolent sun-creatures. They belong to the in-between times and the overlooked places. It's a subtle but effective descriptive tool that builds their atmosphere without needing to say 'these are dark fairies.'