it wouldn't lose its colour range but any thickening would affect the translucency - things are only translucent when they are thin liquids that the underlying paper/support shines through.
I have used watercolour with gouache, which similarly loses the translucency - nice but different, the luminosity isn't the same.
I use a lot of mixed media where all sorts of things are used together.
all this talk of ink makes me feel like a trip to the art shop
It
would keep the translucency if the texture was put on first and left to dry and the ink then washed over it.