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

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

declare module "@mui/material/styles" {
  interface Color {
    50: string;
    100: string;
    200: string;
    300: string;
    400: string;
    500: string;
    600: string;
    700: string;
    800: string;
    900: string;
    950: string;
  }

  type PartialColor = Partial<Color>;

  interface Palette {
    neutral: PartialColor;
  }

  interface PaletteOptions {
    neutral?: PartialColor;
  }

  interface TypeBackground {
    level1: string;
    level2: string;
    level3: string;
  }

  interface Theme {
    // Add custom properties here if needed
  }

  interface ThemeOptions {
    // Add custom properties here if needed
  }
}