I took some track photos the other day, it was evenly overcast so no shadows to warp the image:
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The track in the foreground is ribbonrail on the BNSF mainline. The background is an old siding with sections. The white dots are snow. The tracks do not look nearly that rusty, buit more of a dark gray brown. I will look for a rattle can with something similar, today at the hardware store they had a "camo" color that looked very close.
Someone previously mentioned some type of camo paint.
Here is another photo showing the ties better:
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In our local, the ties look pretty similar. The dusting of snow makes for good contrast.
more later, Dave