Tattoo Cover Up Concealer 2 Colors – Waterproof Full Coverage Foundation for Tattoos, Scars & Imperfections – Long-Lasting, Sweat Resistant & Lightweight – for All Skin Tones – Complete Mixing Kit

So whatever you do make sure you're wearing a dark colored dress otherwise it's not worth the risk! But they make they make theatre makeup that would probably be your best bet. https://www.amazon.com/Tattoo-Cover-Concealer-Colors-Imperfections/dp/B0GYN4ZBZD/ref=zg_m_bs_g_11058321_m_sccl_6/144-6559488-2263546?psc=1 Or actually I would probably go with this tattoo concealer. Make sure to set it with a powder. And make sure to have something to clean your dress or something in case it transfers