feat: add match colouring for ease of use

app/helpers/uprn_address_spike_helper.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module UprnAddressSpikeHelper
+  def match_colour(match)
+    if match >= 0.8
+      "green"
+    elsif match >= 0.7
+      "orange"
+    else
+      "red"
+    end
+  end
+end

app/views/content/uprn_address_spike.html.erb

@@ -32,7 +32,7 @@
     <% @addresses_returned.each do |address_returned| %>
       <p>Address: <%= address_returned.address %></p>
       <p>UPRN: <%= address_returned.uprn %></p>
-      <p>Confidence: <%= address_returned.match%> (<%= address_returned.match_description %>)</p>
+      <p>Confidence: <span style="color:<%= match_colour(address_returned.match) %>"><%= address_returned.match%> (<%= address_returned.match_description %>)</span></p>
       <br>
     <% end %>
   <% end %>