diff --git a/crates/squawk_ide/src/code_actions/mod.rs b/crates/squawk_ide/src/code_actions/mod.rs
index 13495793..d0acbc29 100644
--- a/crates/squawk_ide/src/code_actions/mod.rs
+++ b/crates/squawk_ide/src/code_actions/mod.rs
@@ -17,6 +17,7 @@ mod rewrite_at_time_zone_as_timezone;
 mod rewrite_between_as_binary_expression;
 mod rewrite_cast_to_double_colon;
 mod rewrite_collation_for_as_function_call;
+mod rewrite_colon_eq_as_fat_arrow;
 mod rewrite_create_table_as_as_select_into;
 mod rewrite_double_colon_to_cast;
 mod rewrite_extract_as_function_call;
@@ -24,6 +25,7 @@ mod rewrite_from;
 mod rewrite_in_as_expression;
 mod rewrite_integer_radix;
 mod rewrite_is_normalized_as_function_call;
+mod rewrite_json_value_as_colon;
 mod rewrite_leading_from;
 mod rewrite_normalize_as_function_call;
 mod rewrite_not_equals_operator;
@@ -63,6 +65,7 @@ use rewrite_at_time_zone_as_timezone::rewrite_at_time_zone_as_timezone;
 use rewrite_between_as_binary_expression::rewrite_between_as_binary_expression;
 use rewrite_cast_to_double_colon::rewrite_cast_to_double_colon;
 use rewrite_collation_for_as_function_call::rewrite_collation_for_as_function_call;
+use rewrite_colon_eq_as_fat_arrow::rewrite_colon_eq_as_fat_arrow;
 use rewrite_create_table_as_as_select_into::rewrite_create_table_as_as_select_into;
 use rewrite_double_colon_to_cast::rewrite_double_colon_to_cast;
 use rewrite_extract_as_function_call::rewrite_extract_as_function_call;
@@ -70,6 +73,7 @@ use rewrite_from::rewrite_from;
 use rewrite_in_as_expression::rewrite_in_as_expression;
 use rewrite_integer_radix::rewrite_integer_radix;
 use rewrite_is_normalized_as_function_call::rewrite_is_normalized_as_function_call;
+use rewrite_json_value_as_colon::rewrite_json_value_as_colon;
 use rewrite_leading_from::rewrite_leading_from;
 use rewrite_normalize_as_function_call::rewrite_normalize_as_function_call;
 use rewrite_not_equals_operator::rewrite_not_equals_operator;
@@ -130,6 +134,8 @@ pub fn code_actions(db: &dyn Db, position: InFile<TextSize>) -> Option<Vec<CodeA
     rewrite_between_as_binary_expression(db, position, &mut actions);
     rewrite_not_equals_operator(db, position, &mut actions);
     rewrite_null_predicate(db, position, &mut actions);
+    rewrite_colon_eq_as_fat_arrow(db, position, &mut actions);
+    rewrite_json_value_as_colon(db, position, &mut actions);
     rewrite_timestamp_type(db, position, &mut actions);
     rewrite_unnest_as_rows_from(db, position, &mut actions);
     rewrite_rows_from_as_unnest(db, position, &mut actions);
diff --git a/crates/squawk_ide/src/code_actions/rewrite_colon_eq_as_fat_arrow.rs b/crates/squawk_ide/src/code_actions/rewrite_colon_eq_as_fat_arrow.rs
new file mode 100644
index 00000000..137ab62a
--- /dev/null
+++ b/crates/squawk_ide/src/code_actions/rewrite_colon_eq_as_fat_arrow.rs
@@ -0,0 +1,62 @@
+use rowan::TextSize;
+use salsa::Database as Db;
+use squawk_linter::Edit;
+use squawk_syntax::ast::{self, AstNode};
+
+use crate::{file::InFile, offsets::token_from_offset};
+
+use super::{ActionKind, CodeAction};
+
+pub(super) fn rewrite_colon_eq_as_fat_arrow(
+    db: &dyn Db,
+    position: InFile<TextSize>,
+    actions: &mut Vec<CodeAction>,
+) -> Option<()> {
+    let token = token_from_offset(db, position)?;
+    let named_arg = token.parent_ancestors().find_map(ast::NamedArg::cast)?;
+    let colon_eq = named_arg.colon_eq_token()?;
+
+    actions.push(CodeAction {
+        title: "Rewrite `:=` as `=>`".to_owned(),
+        edits: vec![Edit::replace(colon_eq.text_range(), "=>".to_owned())],
+        kind: ActionKind::RefactorRewrite,
+    });
+
+    Some(())
+}
+
+#[cfg(test)]
+mod test {
+    use insta::assert_snapshot;
+
+    use crate::code_actions::test_utils::{apply_code_action, code_action_not_applicable};
+
+    use super::rewrite_colon_eq_as_fat_arrow;
+
+    #[test]
+    fn rewrites_colon_equals_as_fat_arrow() {
+        assert_snapshot!(
+            apply_code_action(rewrite_colon_eq_as_fat_arrow, "select f(name :$0= 1);"),
+            @"select f(name => 1);"
+        );
+    }
+
+    #[test]
+    fn applies_when_cursor_is_on_argument_value() {
+        assert_snapshot!(
+            apply_code_action(
+                rewrite_colon_eq_as_fat_arrow,
+                "select f(name := lower($0value));",
+            ),
+            @"select f(name => lower(value));"
+        );
+    }
+
+    #[test]
+    fn not_applicable_to_fat_arrow() {
+        assert!(code_action_not_applicable(
+            rewrite_colon_eq_as_fat_arrow,
+            "select f(name =$0> 1);"
+        ));
+    }
+}
diff --git a/crates/squawk_ide/src/code_actions/rewrite_json_value_as_colon.rs b/crates/squawk_ide/src/code_actions/rewrite_json_value_as_colon.rs
new file mode 100644
index 00000000..5bf8fe9d
--- /dev/null
+++ b/crates/squawk_ide/src/code_actions/rewrite_json_value_as_colon.rs
@@ -0,0 +1,84 @@
+use rowan::{TextRange, TextSize};
+use salsa::Database as Db;
+use squawk_linter::Edit;
+use squawk_syntax::{
+    SyntaxKind,
+    ast::{self, AstNode},
+};
+
+use crate::{file::InFile, offsets::token_from_offset};
+
+use super::{ActionKind, CodeAction};
+
+pub(super) fn rewrite_json_value_as_colon(
+    db: &dyn Db,
+    position: InFile<TextSize>,
+    actions: &mut Vec<CodeAction>,
+) -> Option<()> {
+    let token = token_from_offset(db, position)?;
+    let key_value = token.parent_ancestors().find_map(ast::JsonKeyValue::cast)?;
+    let value = key_value.value_token()?;
+    let start = value
+        .prev_token()
+        .filter(|token| token.kind() == SyntaxKind::WHITESPACE)
+        .map_or(value.text_range().start(), |token| {
+            token.text_range().start()
+        });
+
+    actions.push(CodeAction {
+        title: "Rewrite `value` as `:`".to_owned(),
+        edits: vec![Edit::replace(
+            TextRange::new(start, value.text_range().end()),
+            ":".to_owned(),
+        )],
+        kind: ActionKind::RefactorRewrite,
+    });
+
+    Some(())
+}
+
+#[cfg(test)]
+mod test {
+    use insta::assert_snapshot;
+
+    use crate::code_actions::test_utils::{apply_code_action, code_action_not_applicable};
+
+    use super::rewrite_json_value_as_colon;
+
+    #[test]
+    fn rewrites_value_as_colon() {
+        assert_snapshot!(
+            apply_code_action(
+                rewrite_json_value_as_colon,
+                "select json_object('key' VAL$0UE value);",
+            ),
+            @"select json_object('key': value);"
+        );
+        assert_snapshot!(
+            apply_code_action(
+                rewrite_json_value_as_colon,
+                "select json_object('key'VAL$0UE value);",
+            ),
+            @"select json_object('key': value);"
+        );
+    }
+
+    #[test]
+    fn rewrites_json_objectagg_value_as_colon() {
+        assert_snapshot!(
+            apply_code_action(
+                rewrite_json_value_as_colon,
+                "select json_objectagg(lower($0key) VALUE value);",
+            ),
+            @"select json_objectagg(lower(key): value);"
+        );
+    }
+
+    #[test]
+    fn not_applicable_to_colon() {
+        assert!(code_action_not_applicable(
+            rewrite_json_value_as_colon,
+            "select json_object('key' $0: value);"
+        ));
+    }
+}