Install the package

yarn add @stuart/keirin

If using MUI

**theme.ts file // where you create your theme to pass to the provider

import { createTheme } from "@mui/material/styles"; // used to create a default mui theme
import { keirinMuiTheme } from "@stuart/keirin"; // import the keirin theme

const defaultTheme = createTheme(); // create a default mui theme

const theme = createTheme(defaultTheme, {
  ...keirinMuiTheme,  // extend the default mui theme with keirin
  // other overrides
}

**src/shared/theme/ambient.d.ts file // add module augmentation to give you intellisense https://mui.com/material-ui/customization/theming/#custom-variables

import { keirinMuiTheme } from "@stuart/keirin"; // import the keirin theme

declare module "@mui/material/styles" {
  interface Theme {
    keirin: typeof keirinMuiTheme.keirin;
  }

  interface ThemeOptions {
    keirin: typeof keirinMuiTheme.keirin;
  }
}

If not using MUI

import { color, spacing, breakpoints, ... } from "@stuart/keirin"; // destructure any theme properties you want