“大红大紫”和“红得发紫”都是比喻人生显赫如日中天,那么为什么不用别的颜色来形容,而非要用红色和紫色呢?这跟中国古代对颜色的定义以及官服制度密切相关。中国古代把颜色分为正色和间色两种,正色是指青、赤、黄、白、黑5种纯正的颜色,间色是指绀(红青色)、 Why is it unnecessary to use other colors to describe it instead of using red and purple? This is in line with the definition of color in ancient China and the fact that " Official service system is closely related. In ancient China, the colors were divided into positive colors and indirect colors. Positive colors refer to the five pure colors of cyan, red, yellow, white, and black. The inter-color refers to the cyan (red-cyan)