Picture made this morning, very low temp. so the tubes have almost no pressure. The color is "cream" or "butter", made by adding 0.5% oxide brown dye to white paint.
Part of the tubes will always be submerged. I painted that with Veneziani Gummipaint A/F but did not succeed in mixing to the exact color. That paint has so many additives the base color is grayish white, so the end product was dirty yellow