Green pigments are often used in jungle camouflage. This article compares the similarity between 10 commonly used green pigments and plant leaves, including chromium green, alkaline magenta green, alizarin green, iron green, blue pigments(cobalt blue, ultramarine, cobalt sulfonated phthalocyanine, phthalocyanine blue, iron blue), and yellow pigments (bismuth yellow, iron yellow) mixtures, using two spectral similarity evaluation methods. Among them, the similarity between chrome green pigment and plant leaves is the highest, and the similarity in sub bands is good. The types of pigments are distinguished by the first order differential method of spectroscopy, and chromium green pigments with high similarity to plants can be identified by the spectral recognition index method. The spectral recognition index method can quickly extract target information, greatly improving the recognition speed.