diff --git a/theme/static/css/categories.css b/theme/static/css/categories.css
new file mode 100644
index 0000000..a3146e3
--- /dev/null
+++ b/theme/static/css/categories.css
@@ -0,0 +1,7 @@
+.hentry{ border-left: 10px solid; }
+
+.content{ border-color: rgba(0, 0, 0, .2); }
+.dev{ border-color: rgba(150, 200, 150, .2); }
+.python{ border-color: rgba(0, 200, 0, .2); }
+.asso{ border-color: rgba(200, 0, 0, .2); }
+.thoughts{ border-color: rgba(100, 0, 100, .2); }