She narrows her eyes, starting to feel a creeping awareness of the fact that maybe her device hasn't lost colour completely. She'd presumed that it had gone null, but there's one other option here. What if it's gone white?

She doesn't know anyone else with a white band to compare herself to, but this is odd. "The theory was, what, that the band colours were a representation of some part of ourselves?" She's not sure she believes that, but why else would he exhibit a behaviour change? "Nothing else happened? He didn't hit his head or anything?"