diff --git a/techtree-manager/src/tree.rs b/techtree-manager/src/tree.rs
index 207515c..cf693cc 100644
--- a/techtree-manager/src/tree.rs
+++ b/techtree-manager/src/tree.rs
@@ -85,11 +85,11 @@ impl Element {
 
 fn mermaid_classes() -> String {
     r##"
-    classDef eoi fill:#fff, stroke:#000;
+    classDef eoi fill:#fff, stroke:#000, color:#000;
     classDef dependant fill:#fff, stroke:#888, color:#888;
-    classDef dep_missing fill:#fcc, stroke:#800;
-    classDef dep_assigned fill:#ffa, stroke:#a50;
-    classDef dep_completed fill:#afa, stroke:#080;
+    classDef dep_missing fill:#fcc, stroke:#800, color:#000;
+    classDef dep_assigned fill:#ffa, stroke:#a50, color:#000;
+    classDef dep_completed fill:#afa, stroke:#080, color:#000;
 "##
     .to_owned()
 }