Ways to incorporate the CSS class name within the MUI createTheme palette color reference instead of using a hardcoded name

How can I dynamically insert a CSS class name inside the Material-UI(MUI) createTheme palette color instead of hardcoding it?

 const theme = createTheme({
    palette: {
      primary: {
        light: "#66b53f",
        main: **"I want to dynamically insert a css class name here"**,
        dark: "#66b53f",
        contrastText: "#fff",
      },
      secondary: {
        light: "#ff7961",
        main: "#f44336",
        dark: "#ba000d",
        contrastText: "#000",
      },
    },
  });

Answer №1

In my opinion, a more effective approach to defining custom classes within your Theme is to place them inside components/MuiCssBaseLine :

 const theme = createTheme({
    palette: {
      primary: {
        main: "#66b53f",
        dark: "#66b53f",
      },
      secondary: {
        main: "#f44336",
        dark: "#ba000d",
      },
    },
    components : {
       MuiCssBaseLine : {
         styleOverrides : {
           body : {
             "& .custom-css-class" : {
                  color : "white",
                  bgcolor : "grey",
                  ... /* More custom styling */
            }
           }
         }
       }
    }
  });

By doing so, using className="custom-css-class" would be accessible globally to all child components wrapped within your ThemeProvider. Make sure to also import <CssBaseLine /> at the top of your app right after the Theme context.

import { CssBaseLine , ThemeProvider } from "@mui/material"

export default function App() {
/* Add the rest of your code here */
return (
     <ThemeProvider theme={theme}>
      <CssBaseLine />
      <YourApp />
      <div className="custom-css-class">custom-styled-content</div>
     </ThemeProvider>
      );

}

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