Artists employ a variety of techniques to infuse color into metal sculptures, transcending the limitations of natural metal tones. One common method is the application of patinas, chemical solutions that react with the metal to create rich, oxidized hues like verdigris or rust. These patinas can produce organic, earthy tones or vibrant blues and greens, depending on the chemicals used.

Another approach involves painting or powder-coating the metal, allowing for bold, uniform colors or intricate designs. Acrylics, enamels, and automotive paints are popular choices for their durability and vibrant pigmentation. Some artists even incorporate mixed media, embedding glass, ceramics, or resin into the metal to add contrasting textures and colors.

Heat treatment is another innovative technique, where controlled heating alters the metal's surface to produce iridescent or rainbow-like effects. This method is particularly effective with metals like titanium or stainless steel.

By combining these methods, artists transform cold, industrial materials into dynamic, visually striking pieces that challenge traditional perceptions of metal art. The use of color not only enhances aesthetic appeal but also adds emotional depth and narrative to the sculpture.