React Material UI: How to give a button a custom color when disabled?

Or you can try createMuiTheme and customize the following property:

import { createMuiTheme } from '@material-ui/core/styles'

const theme = createMuiTheme({
  palette: {
    action: {
      disabledBackground: 'set color of background here',
      disabled: 'set color of text here'
    }
  }
}