fix: updated fallback color (#10525)

* fix: updated fallback color

* fix: updated testcase

Author: ishan621

frontend/src/container/LogsExplorerChart/__tests__/frequencyGraphColor.test.ts

@@ -4,8 +4,8 @@ import { getColorsForSeverityLabels, isRedLike } from '../utils';
 
 describe('getColorsForSeverityLabels', () => {
 	it('should return slate for blank labels', () => {
-		expect(getColorsForSeverityLabels('', 0)).toBe(Color.BG_SLATE_300);
-		expect(getColorsForSeverityLabels('   ', 0)).toBe(Color.BG_SLATE_300);
+		expect(getColorsForSeverityLabels('', 0)).toBe(Color.BG_VANILLA_400);
+		expect(getColorsForSeverityLabels('   ', 0)).toBe(Color.BG_VANILLA_400);
 	});
 
 	it('should return correct colors for known severity variants', () => {

frontend/src/container/LogsExplorerChart/utils.ts

@@ -79,7 +79,7 @@ export function getColorsForSeverityLabels(
 	const trimmed = label.trim();
 
 	if (!trimmed) {
-		return Color.BG_SLATE_300;
+		return Color.BG_VANILLA_400; // Default color for empty labels
 	}
 
 	const variantColor = SEVERITY_VARIANT_COLORS[trimmed];
@@ -119,6 +119,6 @@ export function getColorsForSeverityLabels(
 
 	return (
 		SAFE_FALLBACK_COLORS[index % SAFE_FALLBACK_COLORS.length] ||
-		Color.BG_SLATE_400
+		Color.BG_VANILLA_400
 	);
 }