In ancient times, senior male officials wore red official uniforms and pants, while women wore black eyebrows in Tsing Yi, so red and green became noble colors, and there were "guys and girls". At that time, men wore red clothes at every important event to show their noble status. Women wear green clothes on every happy occasion to show their nobility and elegance.
Therefore, in Know No, which is set in the Song Dynasty, not only Ming Lan's wedding, but also Moran's wedding is dressed in green finery. The bride doesn't have to cover her face with a red headscarf and a round fan before going out. Mrs. Sheng's wife often wears green clothes in pursuit of plays, just to show her identity as a hall master.
Although both Moran and Minglan wore green wedding dresses, Rulan wore a red wedding dress, because Rulan married Wen Yanjing, who was originally a poor scholar, and later was admitted to Tanhua. In ancient times, only dignitaries and their wives could wear green wedding dresses, but if they were married to a relatively ordinary family, the woman would wear red when she got married, so Ru Lan could only wear red when she got married.
It was not until the Ming Dynasty that women generally wore red wedding clothes. Since then, the custom of both men and women wearing red has been spread to the present, so we all think that marriage is red, but it is actually a modern thing. Through this detail, we can realize that the director of Know No is very careful, taking into account the current background of the times and fully respecting history.