Sample of stripe billing html css code
let Stripe = () => {}
let stripeClient = Stripe(key);
let stripeElements = stripeClient.elements()
let stripeCardElement = stripeElements.create('card', {
style: {
base: {
fontSize: '16px',
fontFamily: 'Lato, "Helvetica Neue", Arial, Helvetica, sans-serif',
color: 'rgba(0,0,0,.87)'
},
invalid: {
color: '#9F3A38',
iconColor: '#9F3A38'
},
focus: {
color: 'rgba(0,0,0,.95)'
}
}
});