Purple and Red Makes What Colour? Complete Mixing Guide and Palette Tips
By James H. Sterling
Every standard color wheel built on traditional artistic color theory places red as a primary pigment and purple as a secondary tone. When you combine an adjacent primary color with a secondary color, you produce a tertiary color. On modern technical wheels, this specific intersection is labeled red-purple or red-violet.
Light behaves additively, while physical paints operate through subtractive color mixing. Each pigment particle you add to a canvas absorbs (subtracts) specific wavelengths of visible light and reflects others back to the eye. Red reflects long wavelengths (620, 750 nm), while purple reflects both long red and short blue wavelengths (380, 450 nm). When you stir them together, blue wavelengths are partially absorbed by the additional red pigments, tipping the balance heavily toward the warmer side of the visible spectrum.
The purity of the outcome depends on whether your purple was mixed cleanly from blue and red, or purchased as a single-pigment formula such as Dioxazine Violet (PV23). A purple that already contains white, black, or complementary yellow filler will immediately drop shade saturation, yielding a muted dusty mauve rather than a radiant ruby.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
