diff --git a/apps/web/src/components/files/FilePreviewPanel.test.ts b/apps/web/src/components/files/FilePreviewPanel.test.ts
index 16572a85f416b..46293599740cb 100644
--- a/apps/web/src/components/files/FilePreviewPanel.test.ts
+++ b/apps/web/src/components/files/FilePreviewPanel.test.ts
@@ -358,7 +358,7 @@ Third}`;
                   output_type: "error",
                   traceback: [
                     "\u001b[31mTraceback (most recent call last):\n\u001b[0m",
-                    "\u001b[32mCell In[3], line 1\n----> 1 fail()\n\u001b[0m\u001b[39m",
+                    "\u001b[38:2::255:0:0mCell In[3], line 1\n----> 1 fail()\n\u001b[0m\u001b[39m",
                     "\u001b[31mValueError: preview proof\u001b[0m",
                     "final entry",
                   ],
diff --git a/packages/shared/src/terminalOutput.ts b/packages/shared/src/terminalOutput.ts
index f8bba6ea8d07e..3c14594eeea03 100644
--- a/packages/shared/src/terminalOutput.ts
+++ b/packages/shared/src/terminalOutput.ts
@@ -960,7 +960,7 @@ export function terminalOutputSpans(
   return spans;
 }
 
-const SGR_PATTERN = new RegExp(`${ESC}\\[[0-9;]*m`, "gu");
+const SGR_PATTERN = new RegExp(`${ESC}\\[[0-9;:]*m`, "gu");
 
 export function terminalOutputPlainText(text: string): string {
   return text.replace(SGR_PATTERN, "");