themes-wordpress/blockbase/sass/blocks/_pullquote.scss

.wp-block-pullquote.is-style-solid-color,
.wp-block-pullquote {
	text-align: var(--wp--custom--pullquote--typography--text-align);
	blockquote {
		padding: 0;
		margin: 0;
		p {
			font-size: 1em;
			padding: 0;
			margin: 0;
			line-height: inherit;
		}

		.wp-block-pullquote__citation, // For the editor
		cite {
			display: block;
			font-size: var(--wp--custom--pullquote--citation--typography--font-size);
			font-family: var(--wp--custom--pullquote--citation--typography--font-family);
			font-style: var(--wp--custom--pullquote--citation--typography--font-style);
			font-weight: var(--wp--custom--pullquote--citation--typography--font-weight);
			margin-top: var(--wp--custom--pullquote--citation--spacing--margin--top);
		}
	}

	&.is-style-solid-color {
		background-color: var(--wp--custom--color--foreground);
		color: var(--wp--custom--color--background);
	}
}