Given her social position and the fact that she was in her prime during a golden age of British portraiture, I find it surprising that Violet was little depicted. And those major portraits of her, as best I could locate via Google, were by only two artists, George Frederic Watts and James Jebusa Shannon.
Other images on the Web have a blue cast to this image. I don't know which color scheme is correct, but am posting this one because it is larger.
Similar to the previous portrait, but Violet was now about 62 years old.