Generally, a seal with white text (white text on a red background) is better. If the inscription is heavy, a Zhuwen (red text on white background) seal can be stamped to balance the effect of the paper.
Calligraphy is a traditional art unique to China. Chinese characters were created by the working people. They began to use pictures to record events. After thousands of years of development, they evolved into today's characters. And because our ancestors invented writing with brushes, calligraphy came into being. Throughout the ages, brushes have been the main method of writing Chinese characters. , as for other writing forms, such as hard pen, finger writing, etc., the writing rules are not completely different from the brush writing rules, but are basically the same.
Based on searching for sources (after fingernail and bone inscriptions), here we focus on the rules of writing Chinese characters with a brush. As long as we have a "narrow sense" understanding of calligraphy, it will be of great benefit to understand "broad calligraphy".