Prussian Blue watercolor is similar to phthalo blue in hue and tonal value, but it is less transparent and not a staining color.
It is one of the three “blues” in the semi-transparent non-staining watercolor palette used for the glazing technique and mixing with other colors.
Measured against a gray scale value finder, semi-transparent non-staining watercolors are generally mid-light in value ranging from 20% to a maximum of 80% value.
So, the colors in the semi-transparent non-staining category are adequate for a mid-tone palette, except for where darker passages require colors with values higher on the gray scale.
Prussian Blue is slightly more opaque than transparent non-staining watercolors and requires more restraint to remain luminous when mixing with other colors.
Semi-transparent non-staining watercolors have similar characteristics to transparent non-staining watercolors, but with a wider range of colors to add to a palette.
Prussian Blue can be layered in several glazes using other semi-transparent non-staining watercolors if each layer is allowed to dry thoroughly before applying the next layer.
COLOR MIXING WITH PRUSSIAN BLUE WATERCOLOR
Add yellows such as Aureolin or New Gamboge and reds such as Permanent Rose or Vermilion to Prussian Blue to mix a variety of green and purple colors.
Mix Prussian Blue with an orange mixture of New Gamboge plus Vermilion to create interesting mid-value semi-transparent gray colors. For a darker gray, mix it with Quinacridone Burnt Orange.
Prussian Blue can also be successfully mixed with watercolors in both the transparent and semi-transparent non-staining categories.
It also makes beautiful, luminous washes when glazed with the other watercolors in the transparent non-staining category.
Mixed with semi-opaque or opaque colors, it will create a combination that is cleaner and more transparent than using only opaque colors.
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… and the recommended semi-transparent non-staining watercolor for mixing grays with Prussian Blue
… also the transparent non-staining category of watercolors for glazing or color mixing with Prussian Blue
To learn more about transparent watercolors, click the link to my blog post “Which watercolor paints are transparent.”
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