We at MrPen used to interpret ink colour by scanning the maker's ink smear. We found that the scanner could change an actual view of the colour and with a further interpretation by the viewing PC could cause an outright distortion. In our computer generated colour representations we try to show the shade as if it were translucent rather than flat. A pen on paper will not always deposit the ink evenly and the ink density can change in a single stroke, it is not emulsion paint after all. This delicate change in shade has been reflected in the examples below.