For me it worked to override ‘sans’, because that’s whats being used by default.
module.exports = {
theme: {
fontFamily: {
sans: ['"PT Sans"', 'sans-serif']
}
},
}
(Note that theme.fontFamily is overriding the 3 defaults, so if you copy paste the above code you lose font-serif and font-mono)
But it would be weird to override ‘sans’ with something like a serif stack, so in those cases you can define the stack and apply it to the html/body tag:
<body class="font-serif"> <!-- Or whatever your named your font stack -->
More about tailwind font families