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; 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 } }