The artistic essence of meticulous-style flower-and-bird painting lies in the creation of artistic conception. As the core expressive language, color serves not only as a medium to reproduce objects but also as a crucial medium for constructing artistic conception and expressing emotions. This paper systematically explores the dynamic role of color in generating artistic conception within meticulous-style paintings. First, it analyzes the philosophical foundations of traditional color theory from the perspectives of "coloring according to species" and "preconceived intent preceding brushwork." Subsequently, it examines the mechanisms of color expression in emotional symbolism, and material synergy through classic works spanning from the Song Dynasty. Finally, it extends to the evolution and expansion paths of contemporary meticulous-style painting's color language.