diff --git a/docs/reference-guides/theme-json-reference/theme-json-living.md b/docs/reference-guides/theme-json-reference/theme-json-living.md
index 627fee6071816f..b2873eacaa0722 100644
--- a/docs/reference-guides/theme-json-reference/theme-json-living.md
+++ b/docs/reference-guides/theme-json-reference/theme-json-living.md
@@ -299,13 +299,6 @@ Outline styles.
 | style | string, object |  |
 | width | string, object |  |
 
----
-
-### css
-
-Sets custom CSS to apply styling not covered by other theme.json properties.
-
-
 ---
 ## customTemplates
 
diff --git a/schemas/json/theme.json b/schemas/json/theme.json
index 10695f493c40dd..15a02224b082d2 100644
--- a/schemas/json/theme.json
+++ b/schemas/json/theme.json
@@ -1732,10 +1732,6 @@
 						}
 					},
 					"additionalProperties": false
-				},
-				"css": {
-					"description": "Sets custom CSS to apply styling not covered by other theme.json properties.",
-					"type": "string"
 				}
 			}
 		},
@@ -1754,8 +1750,7 @@
 						"typography": {},
 						"filter": {},
 						"shadow": {},
-						"outline": {},
-						"css": {}
+						"outline": {}
 					},
 					"additionalProperties": false
 				}
@@ -1779,7 +1774,6 @@
 								"outline": {},
 								"spacing": {},
 								"typography": {},
-								"css": {},
 								":hover": {
 									"$ref": "#/definitions/stylesPropertiesComplete"
 								},
@@ -2189,7 +2183,10 @@
 						"filter": {},
 						"shadow": {},
 						"outline": {},
-						"css": {},
+						"css": {
+							"description": "Sets custom CSS to apply styling not covered by other theme.json properties.",
+							"type": "string"
+						},
 						"elements": {
 							"$ref": "#/definitions/stylesElementsPropertiesComplete"
 						},
@@ -2278,7 +2275,10 @@
 						"filter": {},
 						"shadow": {},
 						"outline": {},
-						"css": {},
+						"css": {
+							"description": "Sets custom CSS to apply styling not covered by other theme.json properties.",
+							"type": "string"
+						},
 						"elements": {
 							"description": "Styles defined on a per-element basis using the element's selector.",
 							"$ref": "#/definitions/stylesElementsPropertiesComplete"