The gold coloring has definitely intensified. Sadly, the red is not as intense as it normally is. I suspect that while the tannins are affecting the mood and coloration of the fish directly, I suspect that it also has to do with the darkness/coloration of the water changing the wavelength of the lighting in the tank thereby highlighting and/or washing out specific colors.
I need something with blue in the tank, such as a piquiti, to see how the water color affects it. I have a sneaky suspicion that the blue fins would absolutely pop.