Microbial pigments are known among natural sources, including melanin, pyocyanin, bacteriochlorophyll, violacein, prodigiosin and carotenoids, which exhibit a variety of biological activity as antioxidants and demonstrate anti-inflammatory, anti-cancer, antiparasitic and antimicrobial properties. Isolation, research and identification of pigment-producing strains are of interest for the development of biotechnological processes aimed at industrial biosynthesis of these compounds. The antibacterial properties of blue-violet (VIO) and red (RED) pigments of new strains of bacteria IB-ST-GO and IB-ST-GOR isolated from natural waters of the Shulgan-Tash cave's vaucluse spring (Southern Urals) have been studied. Sequence analysis of the 16S rRNA gene revealed that the producers of IB-ST-GO and IB-ST-GOR pigments belong to representatives of Janthinobacterium lividum with a similarity level of 99.72 and 99.86% respectively. The pigments were extracted with 96% ethanol from biomass obtained by cultivating strains on Wakimoto agar medium. According to the results of spectrophotometric analysis, it was found that the VIO pigment belongs to the violacein family, and the RED pigment belongs to
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