plasmonic noble metal nanoparticles such as gold and silver nanoparticles, and hybrid multi-metallic nanoparticle systems . Among these nanoparticle systems, plasmonically active nanoparticles show great promise for achieving enhanced colorimetric optical brightness. These materials exhibit bright optical properties, making them highly effective in colorimetric readout methods . It is important to note that the color intensity of plasmonic nanoparticles is primarily governed by their localized surface plasmon resonance (LSPR) properties, which are linked to the extinction coefficient that dictates the overall color of the nanoparticle system .