You can pass a style object to the renderForm which will apply custom styles to the onboarding form.

const style = {
    theme: {
        brandColors: {
            50: "#F0FFF4",
            100: "#C6F6D5",
            200: "#9AE6B4",
            300: "#68D391",
            400: "#48BB78",
            500: "#38A169",
            600: "#2F855A",
            700: "#276749",
            800: "#22543D",
            900: "#1C4532",
        },
    },
    inputBackgroundColor: "#fff",
};

​
theme.brandColors

The form uses the brandColors object to add a little bit of color. Items like buttons and checkbox background colors use the brandColors.

Here’s a snapshot of what the form would look like if you used the style object above.