diff --git a/src/main/java/io/github/homchom/recode/feature/visual/ExpressionHighlighting.kt b/src/main/java/io/github/homchom/recode/feature/visual/ExpressionHighlighting.kt
index 1d6f3faa..f8d9f5a4 100644
--- a/src/main/java/io/github/homchom/recode/feature/visual/ExpressionHighlighting.kt
+++ b/src/main/java/io/github/homchom/recode/feature/visual/ExpressionHighlighting.kt
@@ -125,6 +125,6 @@ class ExpressionHighlighter {
     private fun styleAt(depth: Int) = if (depth == 0) {
         style()
     } else {
-        style().color(colors[depth - 1 % colors.size])
+        style().color(colors[(depth - 1) % colors.size])
     }
 }
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