diff --git a/ext/riverlea/streams/thames/css/_dark.css b/ext/riverlea/streams/thames/css/_dark.css
index 36918b76c121..7b104be0b8ec 100644
--- a/ext/riverlea/streams/thames/css/_dark.css
+++ b/ext/riverlea/streams/thames/css/_dark.css
@@ -11,6 +11,7 @@
   --crm-c-code-background: var(--crm-c-dkblue-04);
   --crm-dashlet-bg: var(--crm-c-dkblue-02);
   --crm-c-green: #335417;
+  --crm-c-green-light: var(--crm-c-green);
   --crm-c-link: var(--crm-c-dkblue-08);
   --crm-c-link-hover: color-mix(in srgb, white, var(--crm-c-dkblue-08) 70%);
   --crm-dash-header-col: var(--crm-c-blue-light);