Use saturate() CSS function that super-saturates or desaturates the input element.
backdrop-saturate-0
backdrop-saturate-25
backdrop-saturate-50
backdrop-saturate-75
backdrop-saturate-100
backdrop-saturate-125
backdrop-saturate-150
backdrop-saturate-175
backdrop-saturate-200
backdrop-saturate-250
backdrop-saturate-300
backdrop-saturate-400