Traditional fresco painting relies heavily on earth tones and mineral-based pigments that can withstand the chemical reaction with wet lime plaster. Common colors include ochre, terracotta, burnt sienna, and various shades of umber. These earthy hues provide a durable foundation for large scale mural works because they bond permanently with the surface during the drying process.
In addition to earth tones, artists often utilized lapis lazuli for deep blues and malachite or verdigris for greens. However, these pigments were historically expensive and sometimes reserved for high status commissions. Red and yellow ochres are frequently seen in religious and historical frescos due to their availability and cost effectiveness. The chemical stability of these minerals ensures that the colors remain vibrant over centuries when properly applied.
The specific color palette often depends on the geographical location where materials were sourced and the artistic period. For example, Italian Renaissance frescos frequently feature a wide range of warm tones combined with cool blues and greens to create depth and perspective in large architectural spaces. You can find more information about fresco techniques at the official websites of major museums like the Vatican Museums.