We used to often go out for walks at dusk along our road in the warm months... very rural, hardly any traffic back then... and our 3 cats usually came with us. The dark tabby cat stood out clearly against the road in the failing light, whereas the two gingers grew steadily harder to see and you might easily trip over them.
The colour of objects rapidly disappears as darkness falls, our eyes' receptors dependent upon reflected light to see their colours. All we can make out in the poor light are tones... light and dark... so it doesn't matter at all what colour something is at night, it will be invisible unless you either shine a light on it, or it moves in front of something of a highly contrasting tone. Thus the ginger cats would disappear against the grey road
This is why I've never understood why the RAF painted its night fighters and bombers black (Bomber Command operated mostly by night) for surely nothing could be guaranteed to stand out more against the clouds than a black aircraft. The Germans, on the other hand, were far more canny... painting their nightfighters in an overall dapple of mid and light greys. I think the RAF would've been better painting their night-flying planes in the medium grey-blue used on photo recon aircraft... or even simply leaving them in day camouflage
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