Flowers are among the most colorful and attractive elements in nature. In visual communication design, they carry meanings beyond decoration, serving both psychological and cultural roles. With the rise of environmental awareness, color has become an important tool for promoting sustainability. This study takes the brand “Waiting for a Flower to Bloom” as an example and explores how natural colors are applied in eco-friendly brand design, based on theories of color psychology and semiotics. Through systematic analysis of logo, typography, graphics, standard colors, and derivatives, it shows how green, yellow, and other hues evoke emotional resonance and enhance brand identity, value communication, and environmental education. The study finds that a scientific color strategy not only improves aesthetic appeal and market recognition but also effectively promotes eco-conscious values.