Color box, paint box and picture box are all acceptable. They are all authentic English. Just like there are many "authentic" names for color mixing boxes in Chinese, such as color mixing boxes, paint boxes, oil painting boards, oil painting boxes, color palette and so on. It should be pointed out that pigments generally refer to oil painting, watercolor painting and gouache, and color boxes should be color boxes. So it is commonly known as the color box. Color boxes are also commonly used in software.