Sable de luz amarillo

Yellow is the rarest blade on screen: the Jedi Temple Guards' pikes, and then Rey's own saber in the closing shot of The Rise of Skywalker. This is what yellow signifies and where it actually appears. Blade colour is a soundboard setting rather than a fixed part of any hilt, so any saber here can be run yellow — see the Rey Skywalker hilts or the wider Jedi range.