diff --git a/app/map_styles/polygon.xml b/app/map_styles/polygon.xml
index b60ececd..aa6bf2e6 100644
--- a/app/map_styles/polygon.xml
+++ b/app/map_styles/polygon.xml
@@ -146,19 +146,19 @@
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1900 and [date_year] &lt; 1920</Filter>
-            <PolygonSymbolizer fill="#ba221c" />
+            <PolygonSymbolizer fill="#8f5385" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1880 and [date_year] &lt; 1900</Filter>
-            <PolygonSymbolizer fill="#961259" />
+            <PolygonSymbolizer fill="#56619b" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1860 and [date_year] &lt; 1880</Filter>
-            <PolygonSymbolizer fill="#4855a6" />
+            <PolygonSymbolizer fill="#5591d4" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1840 and [date_year] &lt; 1860</Filter>
-            <PolygonSymbolizer fill="#8f5385" />
+            <PolygonSymbolizer fill="#6793b2" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1800 and [date_year] &lt; 1840</Filter>
@@ -171,6 +171,7 @@
         <Rule>
             <Filter>[date_year] &lt; 1700</Filter>
             <PolygonSymbolizer fill="#ffffff" />
+            <LineSymbolizer stroke="#888888" />
         </Rule>
     </Style>
     <Style name="conservation_area">
diff --git a/app/src/frontend/map/legend.tsx b/app/src/frontend/map/legend.tsx
index db5e1359..ba3d452f 100644
--- a/app/src/frontend/map/legend.tsx
+++ b/app/src/frontend/map/legend.tsx
@@ -50,13 +50,13 @@ const LEGEND_CONFIG = {
             { color: '#fbaf27', text: '1960–1980' },
             { color: '#e6711d', text: '1940–1960' },
             { color: '#d73d3a', text: '1920–1940' },
-            { color: '#ba221c', text: '1900–1920' },
-            { color: '#961259', text: '1880–1900' },
-            { color: '#4855a6', text: '1860–1880' },
-            { color: '#8f5385', text: '1840–1860' },
-            { color: '#83c3b3', text: '1800–1840' },
+            { color: '#8F5385', text: '1900–1920' },
+            { color: '#56619B', text: '1880–1900' },
+            { color: '#5591d4', text: '1860–1880' },
+            { color: '#6793B2', text: '1840–1860' },
+            { color: '#83c3b3', text: '1800–1840' }, 
             { color: '#adc88f', text: '1700–1800' },
-            { color: '#ffffff', text: '<1700' },
+            { color: '#ffffff', border: '1px solid #888888', text: '<1700' },
         ]
     },
     size: {