import { PaletteColor, PaletteColorOptions, Theme } from "@mui/material/styles" declare module "@mui/styles/defaultTheme" { interface DefaultTheme extends Theme {} } declare module "@mui/material/styles" { interface TypeBackground { paperLight: string } interface Palette { neutral: PaletteColor } interface PaletteOptions { neutral?: PaletteColorOptions } } declare module "@mui/material/Button" { interface ButtonPropsColorOverrides { neutral: true } }