Change debug color to grey

.changeset/late-singers-speak.md

@@ -0,0 +1,5 @@
+---
+'@backstage/backend-common': patch
+---
+
+Change debug log format to print as color grey

packages/backend-common/src/logging/formats.ts

@@ -34,7 +34,7 @@ const coloredTemplate = (info: TransformableInfo) => {
 export const coloredFormat = winston.format.combine(
   winston.format.timestamp(),
   winston.format.colorize({
-    colors: { timestamp: 'dim', prefix: 'blue', field: 'cyan' },
+    colors: { timestamp: 'dim', prefix: 'blue', field: 'cyan', debug: 'grey' },
   }),
   winston.format.printf(coloredTemplate),
 );