Liquid metals (LMs) are the functional materials with both metallic and liquid properties, remaining in a liquid state at room temperature. The fluidity, electrical conductivity, printability, and self-healing capabilities provide liquid metals with significant advantages for applications in electronics. However, liquid metals generally exhibit a silver-white coloration, the single physical appearance restricted their applicability. Fortunately, the metal halide perovskites serve as fluorescent materials characterized by their abundant fluorescence properties. The atomic-level halogenation transformation of liquid metals surface will endow them with unique fluorescence properties, and providing groundbreaking opportunities for applications. Herein, the aluminum (Al) was dissolved and then dispersed in eGaSn to produce the eGaSn-Al materials. Subsequently, the solutions of KX + HX (where X = Cl, Br, I) were dropped onto the surface of the eGaSn-Al. Then, the metal halide fluorescent shells with different colors were formed, and endowing them with abundant fluorescent properties. Particularly, through the selection, regulation and combination of halogen elements, resulting colorful liquid metals with cyan, cyan-green, and yellow-green. This finding presents innovative concepts for the interface modification and special functional applications of liquid metals, and expands their application potential in electronic information devices, such as lighting and displays, anti-counterfeiting measures, sensing, and chameleon robotics.