diff --git a/ftl/core/preferences.ftl b/ftl/core/preferences.ftl
index ce24df434..75420fa63 100644
--- a/ftl/core/preferences.ftl
+++ b/ftl/core/preferences.ftl
@@ -60,6 +60,7 @@ preferences-full-screen-only = Full screen only
 preferences-appearance = Appearance
 preferences-general = General
 preferences-style = Style
+preferences-color-blind = Color Blind Mode
 preferences-review = Review
 preferences-answer-keys = Answer keys
 preferences-distractions = Distractions
diff --git a/qt/aqt/forms/preferences.ui b/qt/aqt/forms/preferences.ui
index 807d4093c..a5d677328 100644
--- a/qt/aqt/forms/preferences.ui
+++ b/qt/aqt/forms/preferences.ui
@@ -104,6 +104,23 @@
           <string>preferences_user_interface</string>
          </property>
          <layout class="QGridLayout" name="gridLayout_2">
+          <item row="1" column="0">
+           <widget class="QLabel" name="styleLabel">
+            <property name="text">
+             <string>preferences_style</string>
+            </property>
+            <property name="buddy">
+             <cstring>styleComboBox</cstring>
+            </property>
+           </widget>
+          </item>
+          <item row="1" column="1">
+           <widget class="QComboBox" name="styleComboBox">
+            <property name="currentText">
+             <string/>
+            </property>
+           </widget>
+          </item>
           <item row="0" column="1">
            <widget class="QComboBox" name="theme"/>
           </item>
@@ -123,23 +140,6 @@
             </property>
            </widget>
           </item>
-          <item row="1" column="1">
-           <widget class="QComboBox" name="styleComboBox">
-            <property name="currentText">
-             <string/>
-            </property>
-           </widget>
-          </item>
-          <item row="1" column="0">
-           <widget class="QLabel" name="styleLabel">
-            <property name="text">
-             <string>preferences_style</string>
-            </property>
-            <property name="buddy">
-             <cstring>styleComboBox</cstring>
-            </property>
-           </widget>
-          </item>
           <item row="0" column="0">
            <widget class="QLabel" name="themeLabel">
             <property name="text">
@@ -160,13 +160,26 @@
             </property>
            </widget>
           </item>
-          <item row="3" column="0" colspan="2">
+          <item row="4" column="0" colspan="2">
            <widget class="QPushButton" name="resetWindowSizes">
             <property name="text">
              <string>preferences_reset_window_sizes</string>
             </property>
            </widget>
           </item>
+          <item row="3" column="0">
+           <widget class="QCheckBox" name="color_blind">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="text">
+             <string>preferences_color_blind</string>
+            </property>
+           </widget>
+          </item>
          </layout>
         </widget>
        </item>
diff --git a/ts/routes/graphs/calendar.ts b/ts/routes/graphs/calendar.ts
index 863923095..dcef8d13b 100644
--- a/ts/routes/graphs/calendar.ts
+++ b/ts/routes/graphs/calendar.ts
@@ -20,6 +20,7 @@ import {
     timeSaturday,
     timeSunday,
     timeYear,
+    interpolateMagma
 } from "d3";
 
 import type { GraphBounds, SearchDispatch } from "./graph-helpers";
@@ -136,10 +137,10 @@ export function renderCalendar(
         }
     }
     const data = Array.from(dayMap.values());
-    const cappedRange = scaleLinear().range([0.2, nightMode ? 0.8 : 1]);
+    const cappedRange = scaleLinear().range([1,0]);
     const blues = scaleSequentialSqrt()
         .domain([0, maxCount])
-        .interpolator((n) => interpolateBlues(cappedRange(n)!));
+        .interpolator((n) => interpolateMagma(cappedRange(n)!));
 
     function tooltipText(d: DayDatum): string {
         const date = localizedDate(d.date, {
diff --git a/ts/routes/graphs/future-due.ts b/ts/routes/graphs/future-due.ts
index 6100470b7..5b927a2f2 100644
--- a/ts/routes/graphs/future-due.ts
+++ b/ts/routes/graphs/future-due.ts
@@ -10,7 +10,7 @@ import * as tr from "@generated/ftl";
 import { localizedNumber } from "@tslib/i18n";
 import { dayLabel } from "@tslib/time";
 import type { Bin } from "d3";
-import { bin, extent, interpolateGreens, scaleLinear, scaleSequential, sum } from "d3";
+import { bin, extent, interpolateGreens, scaleLinear, scaleSequential, sum, interpolateViridis } from "d3";
 
 import type { SearchDispatch, TableDatum } from "./graph-helpers";
 import { getNumericMapBinValue, GraphRange, numericMap } from "./graph-helpers";
@@ -108,8 +108,9 @@ export function buildHistogram(
     }
 
     const xTickFormat = (n: number): string => localizedNumber(n);
-    const adjustedRange = scaleLinear().range([0.7, 0.3]);
-    const colourScale = scaleSequential((n) => interpolateGreens(adjustedRange(n)!)).domain([xMin!, xMax!]);
+    
+    const adjustedRange = scaleLinear().range([0.0, 1]);
+    const colourScale = scaleSequential((n) => interpolateViridis(adjustedRange(n)!)).domain([xMin!, xMax!]);
 
     const total = sum(bins as any, getNumericMapBinValue);