Artist Paint Mixing Guide

Paint color mixing ratios for artists follow both pigment theory and the specific medium being used (oil, acrylic, watercolor, gouache). The goal is to predict and reproduce exact hues, values, and saturations by specifying precise proportions.

Ratio notation: Mixing ratios are expressed as parts by volume (not weight, unless using professional pigment concentrations).

Color = Part A : Part B : Part C (e.g. 2:1:0.5)

Where the total parts sum to give your batch size: Volume of each pigment = (Part Share ÷ Total Parts) × Total Volume Needed

Subtractive color mixing (pigments — what paint uses):

• Primary pigments: Red, Yellow, Blue (traditional) or Cyan, Magenta, Yellow (modern process colors)
• Secondaries: Red + Yellow = Orange | Yellow + Blue = Green | Red + Blue = Purple/Violet
• Tertiaries: Mix a primary with an adjacent secondary

Value (lightness) adjustment:

• Tinting (lighter): Add white — titanium white is opaque; zinc white is more transparent
• Shading (darker): Add black sparingly — it quickly deadens color. Better: mix the complement color to darken naturally
• Toning: Add a neutral gray

Saturation (chroma) adjustment:

• Reduce saturation: Add the color’s complement (opposite on the color wheel)
• Red’s complement: Green | Blue’s complement: Orange | Yellow’s complement: Violet

Hue temperature:

• Warm: Reds, oranges, yellows — advance in paintings (appear closer)
• Cool: Blues, violets, blue-greens — recede (appear farther)
• Mix warm and cool versions of the same color family to control temperature

Acrylic vs. oil mixing notes:

• Acrylics dry 10–30% darker — mix slightly lighter than target
• Oils dry negligibly different — WYSIWYG when wet
• Never mix oil into acrylics — they are chemically incompatible

Worked example — mixing a specific flesh tone (acrylic): Target: warm mid-tone flesh.

Base recipe: 4 parts titanium white : 1 part cadmium orange : 0.5 parts raw sienna : 0.1 parts cadmium red

Total parts: 5.6. To make 100ml of paint:

• Titanium white: (4 ÷ 5.6) × 100 = 71.4 ml
• Cadmium orange: (1 ÷ 5.6) × 100 = 17.9 ml
• Raw sienna: (0.5 ÷ 5.6) × 100 = 8.9 ml
• Cadmium red: (0.1 ÷ 5.6) × 100 = 1.8 ml

Record your exact ratios every time — this is the only reliable way to reproduce a custom color in a future painting session.