Well, I'm looking at this from the perspective of a painter.
It takes more money and more effort to make a reddish-brown root than to simply drawn a brown one (or pale-brown one) that matches much better to ginger., so it appears to be a deliberate diversion from what would have been easier.
A solid, large reddish-brown root is not characteristic for ginger and is quite a bit more work than doing brown or pale brown. You have to mix in quite a bit of red to turn it this color.
In other words, the person put in extra expense and effort to make it a color that looks LESS like ginger.
It takes more money and more effort to make a reddish-brown root than to simply drawn a brown one (or pale-brown one) that matches much better to ginger., so it appears to be a deliberate diversion from what would have been easier.
A solid, large reddish-brown root is not characteristic for ginger and is quite a bit more work than doing brown or pale brown. You have to mix in quite a bit of red to turn it this color.
In other words, the person put in extra expense and effort to make it a color that looks LESS like ginger.