diff --git a/rsconcept/frontend/src/utils/color.ts b/rsconcept/frontend/src/utils/color.ts
index 65702ffb..cf046bd1 100644
--- a/rsconcept/frontend/src/utils/color.ts
+++ b/rsconcept/frontend/src/utils/color.ts
@@ -204,7 +204,7 @@ export const graphLightT = {
 
 export const graphDarkT = {
   canvas: {
-    background: '#181818' // var(--cd-bg-100)
+    background: '#171717' // var(--cd-bg-100)
   },
   node: {
     fill: '#7a8c9e',