diff --git a/crates/theme2/src/theme2.rs b/crates/theme2/src/theme2.rs
index c5c79237bacd4cac868ac1c7ac64645d04ce8275..ff80b9f5f9a2820ece15a49aa9b7257d0be9b89d 100644
--- a/crates/theme2/src/theme2.rs
+++ b/crates/theme2/src/theme2.rs
@@ -150,3 +150,9 @@ pub struct DiagnosticStyle {
     pub hint: Hsla,
     pub ignored: Hsla,
 }
+
+pub fn color_alpha(color: Hsla, alpha: f32) -> Hsla {
+    let mut color = color;
+    color.a = alpha;
+    color
+}