The Kendo UI Default theme is available through the @progress/kendo-theme-default NPM module.
Download and install the package of the Default theme.
npm install --save @progress/kendo-theme-default
Apply the Default theme options according to the instructions in the article on styling.
You can apply the Default theme to all Kendo UI for React examples, which demonstrate the behavior of a component, by selecting the theme from the theme-chooser at the top-right corner of the page.