themes-wordpress/marl/theme.json

{
    "version": 2,
    "settings": {
        "color": {
            "palette": [
                {
                    "slug": "foreground",
                    "color": "#14453d",
                    "name": "Foreground",
                    "default": "#333333"
                },
                {
                    "slug": "background",
                    "color": "#fcf9f4",
                    "name": "Background",
                    "default": "#ffffff"
                },
                {
                    "slug": "tertiary",
                    "color": "#ECECE7",
                    "name": "Tertiary",
                    "default": "#ECECE7"
                }
            ]
        },
        "custom": {
            "color": {
                "foreground": "var(--wp--preset--color--foreground)",
                "background": "var(--wp--preset--color--background)",
                "primary": "var(--wp--preset--color--foreground)",
                "secondary": "var(--wp--preset--color--foreground)",
                "tertiary": "var(--wp--preset--color--tertiary)"
            }
        }
    },
    "styles": {
        "blocks": {
            "core/heading": {
                "typography": {
			        "fontFamily": "var:preset|font-family|eb-garamond"
                }
            },
            "core/post-title": {
                "typography": {
			        "fontFamily": "var:preset|font-family|eb-garamond"
                }
            }
        },
        "typography": {
			"fontFamily": "var:preset|font-family|fira-sans"
        }
    }
}