Theme.json Version 1 Reference Edit

Theme.json version 2 has been released, see the theme.json migration guide for updating to the latest version.

Property	Type	Default	Props
customRadius	boolean	false

Property	Type	Default	Props
custom	boolean	true
customDuotone	boolean	true
customGradient	boolean	true
duotone	array		colors, name, slug
gradients	array		gradient, name, slug
link	boolean	false
palette	array		color, name, slug

Property	Type	Default	Props
contentSize	string
wideSize	string

Property	Type	Default
customMargin	boolean	false
customPadding	boolean	false
units	array	px,em,rem,vh,vw,%

Property	Type	Default	Props
customFontSize	boolean	true
customLineHeight	boolean	false
dropCap	boolean	true
fontSizes	array		name, size, slug

Generate custom CSS custom properties of the form --wp--custom--{key}--{nested-key}: {value};. camelCased keys are transformed to kebab-case as to follow the CSS property naming schema. Keys at different depth levels are separated by --, so keys should not include -- in the name.

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