#272C21相关的系统推荐颜色搭配（系统根据明暗和色调推荐的颜色）
#212C21 #212C26 #212C2B #21272C #21212C #26212C #2B212C #2C2127 #2C2121 #2C2621 #2C2B21 #464E3B #657156 #443B4E #625671
#272C21相关的相邻颜色（颜色轻微变化，相似度极高）
#272C20 #272C22 #272C23 #272C24 #272C25 #272C26 #272C27 #272C28 #272C29 #272C2A #272C2B #272C2C #272C2D #272C2E #272C2F