What color is the Spring Festival couplets written by the Qing court?

White couplets are the characteristics of Manchu. Early Manchu people were cheap, red and white. They think red is a very unlucky color. We (hunt) in the mountains in winter. Red is the color of raw meat, which is very vulnerable to wild animals. So Manchu people hunt in winter, and hunters wear white clothes. From the Qing Dynasty to the Qianlong period, the habit of accepting the Han nationality became more and more, and the Spring Festival couplets of Manchu civilians gradually became popular. But it is also edged with the color of the national flag, and the court couplets have always been white. At present, there are many Qing Dynasty door gods and Spring Festival couplets in Shenyang Forbidden City, which are still hung during the Spring Festival every year.