Richard - its nice watercolor - but you cant compare it with oil paintings
the brightest white in watercolor is untouched paper
the darkest is not black -its a mixture of complimentary colors
I like to use the white paper instead of opaque white pigment, but do like using Paynes Gray instead of black espesally when doing Asian type watercolors. Payne's Gray is Cad. Orange mixed with Ultramarine Blue.
Chinese painting does use black ink but I prefer Payne's Gray.