What boron salt burns the best green

The boron salt that is known for producing a bright green flame when burned is boric acid (H₃BO₃) or more commonly, boron compounds like sodium borate (commonly known as borax, Na₂B₄O₇·10H₂O). When these compounds are added to a flame, they emit a characteristic green color, which is due to the presence of boron. For applications like pyrotechnics or flame effects, boron compounds are often used to achieve this vibrant green coloration.