react-material-dashboard/src/styles/theme/create-theme.ts

import { createTheme } from "@mui/material/styles";

import { colorSchemes } from './color-schemes';
import { components } from './components/components';
import { shadows } from './shadows';
import type { Theme } from './types';
import { typography } from './typography';

function customCreateTheme(): Theme {
  const theme = createTheme({
    breakpoints: { values: { xs: 0, sm: 600, md: 900, lg: 1200, xl: 1440 } },
    colorSchemes,
    components,
    cssVariables: {
			colorSchemeSelector: "class",
		},
    direction: "ltr",
    shadows,
    shape: { borderRadius: 8 },
    typography,
  });

  return theme;
}

export { customCreateTheme as createTheme };