The term 'Metallic color tuning method color block' refers to a method used in graphic design and color theory for creating and adjusting metallic colors. It involves the use of specific color blocks or swatches that represent metallic shades and finishes. These blocks are typically used in design software to ensure consistency and accuracy in metallic color representation across various media. The process may include selecting base colors, adjusting the sheen and reflectivity, and fine-tuning the hue to achieve the desired metallic effect.