UI: update border color for reactions

Change-Id: I7933b14547a0e75b10208d53ab28c3d120fbfa10
diff --git a/Ring/Ring/Features/Conversations/Conversation/MessageSwiftUI/Views/MessageContentView.swift b/Ring/Ring/Features/Conversations/Conversation/MessageSwiftUI/Views/MessageContentView.swift
index 5c434bd..75df6dc 100644
--- a/Ring/Ring/Features/Conversations/Conversation/MessageSwiftUI/Views/MessageContentView.swift
+++ b/Ring/Ring/Features/Conversations/Conversation/MessageSwiftUI/Views/MessageContentView.swift
@@ -185,7 +185,7 @@
             .cornerRadius(10)
             .overlay(
                 RoundedRectangle(cornerRadius: 10)
-                    .stroke(Color(model.preferencesColor), lineWidth: 0.8)
+                    .stroke(model.backgroundColor, lineWidth: 0.8)
             )
             .padding(.trailing, 10)
             .padding(.leading, 30)