diff --git a/app/map_styles/polygon.xml b/app/map_styles/polygon.xml
index 7f8fa9c4..b60ececd 100644
--- a/app/map_styles/polygon.xml
+++ b/app/map_styles/polygon.xml
@@ -150,55 +150,27 @@
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1880 and [date_year] &lt; 1900</Filter>
-            <PolygonSymbolizer fill="#bb859b" />
+            <PolygonSymbolizer fill="#961259" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1860 and [date_year] &lt; 1880</Filter>
-            <PolygonSymbolizer fill="#8b3654" />
+            <PolygonSymbolizer fill="#4855a6" />
         </Rule>
         <Rule>
             <Filter>[date_year] &gt;= 1840 and [date_year] &lt; 1860</Filter>
             <PolygonSymbolizer fill="#8f5385" />
         </Rule>
         <Rule>
-            <Filter>[date_year] &gt;= 1820 and [date_year] &lt; 1840</Filter>
-            <PolygonSymbolizer fill="#56619b" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1800 and [date_year] &lt; 1820</Filter>
-            <PolygonSymbolizer fill="#6793b2" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1780 and [date_year] &lt; 1800</Filter>
+            <Filter>[date_year] &gt;= 1800 and [date_year] &lt; 1840</Filter>
             <PolygonSymbolizer fill="#83c3b3" />
         </Rule>
         <Rule>
-            <Filter>[date_year] &gt;= 1760 and [date_year] &lt; 1780</Filter>
+            <Filter>[date_year] &gt;= 1700 and [date_year] &lt; 1800</Filter>
             <PolygonSymbolizer fill="#adc88f" />
         </Rule>
         <Rule>
-            <Filter>[date_year] &gt;= 1740 and [date_year] &lt; 1760</Filter>
-            <PolygonSymbolizer fill="#83a663" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1720 and [date_year] &lt; 1740</Filter>
-            <PolygonSymbolizer fill="#77852d" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1700 and [date_year] &lt; 1720</Filter>
-            <PolygonSymbolizer fill="#69814e" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1680 and [date_year] &lt; 1700</Filter>
-            <PolygonSymbolizer fill="#d0c291" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &gt;= 1660 and [date_year] &lt; 1680</Filter>
-            <PolygonSymbolizer fill="#918158" />
-        </Rule>
-        <Rule>
-            <Filter>[date_year] &lt; 1660</Filter>
-            <PolygonSymbolizer fill="#7a5732" />
+            <Filter>[date_year] &lt; 1700</Filter>
+            <PolygonSymbolizer fill="#ffffff" />
         </Rule>
     </Style>
     <Style name="conservation_area">
diff --git a/app/src/frontend/map/legend.tsx b/app/src/frontend/map/legend.tsx
index 2e62e75d..db5e1359 100644
--- a/app/src/frontend/map/legend.tsx
+++ b/app/src/frontend/map/legend.tsx
@@ -51,19 +51,12 @@ const LEGEND_CONFIG = {
             { color: '#e6711d', text: '1940–1960' },
             { color: '#d73d3a', text: '1920–1940' },
             { color: '#ba221c', text: '1900–1920' },
-            { color: '#bb859b', text: '1880–1900' },
-            { color: '#8b3654', text: '1860–1880' },
+            { color: '#961259', text: '1880–1900' },
+            { color: '#4855a6', text: '1860–1880' },
             { color: '#8f5385', text: '1840–1860' },
-            { color: '#56619b', text: '1820–1840' },
-            { color: '#6793b2', text: '1800–1820' },
-            { color: '#83c3b3', text: '1780–1800' },
-            { color: '#adc88f', text: '1760–1780' },
-            { color: '#83a663', text: '1740–1760' },
-            { color: '#77852d', text: '1720–1740' },
-            { color: '#69814e', text: '1700–1720' },
-            { color: '#d0c291', text: '1680–1700' },
-            { color: '#918158', text: '1660–1680' },
-            { color: '#7a5732', text: '<1660' },
+            { color: '#83c3b3', text: '1800–1840' },
+            { color: '#adc88f', text: '1700–1800' },
+            { color: '#ffffff', text: '<1700' },
         ]
     },
     size: {