diff --git a/cura/ExtrudersModel.py b/cura/ExtrudersModel.py
index 7edbb8b7c5..e300a9d73f 100644
--- a/cura/ExtrudersModel.py
+++ b/cura/ExtrudersModel.py
@@ -18,8 +18,8 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
     ##  Human-readable name of the extruder.
     NameRole = Qt.UserRole + 2
 
-    ##  Colour of the material loaded in the extruder.
-    ColourRole = Qt.UserRole + 3
+    ##  Color of the material loaded in the extruder.
+    ColorRole = Qt.UserRole + 3
 
     ##  Index of the extruder, which is also the value of the setting itself.
     #
@@ -28,9 +28,9 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
     #   containers.
     IndexRole = Qt.UserRole + 4
 
-    ##  List of colours to display if there is no material or the material has no known
-    #   colour.
-    defaultColours = ["#ffc924", "#86ec21", "#22eeee", "#245bff", "#9124ff", "#ff24c8"]
+    ##  List of colors to display if there is no material or the material has no known
+    #   color.
+    defaultColors = ["#ffc924", "#86ec21", "#22eeee", "#245bff", "#9124ff", "#ff24c8"]
 
     ##  Initialises the extruders model, defining the roles and listening for
     #   changes in the data.
@@ -41,7 +41,7 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
 
         self.addRoleName(self.IdRole, "id")
         self.addRoleName(self.NameRole, "name")
-        self.addRoleName(self.ColourRole, "colour")
+        self.addRoleName(self.ColorRole, "color")
         self.addRoleName(self.IndexRole, "index")
 
         self._add_global = False
@@ -99,11 +99,11 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
 
         if self._add_global:
             material = global_container_stack.findContainer({ "type": "material" })
-            colour = material.getMetaDataEntry("color_code", default = self.defaultColours[0]) if material else self.defaultColours[0]
+            color = material.getMetaDataEntry("color_code", default = self.defaultColors[0]) if material else self.defaultColors[0]
             item = {
                 "id": global_container_stack.getId(),
                 "name": "Global",
-                "colour": colour,
+                "color": color,
                 "index": -1
             }
             self.appendItem(item)
@@ -118,12 +118,12 @@ class ExtrudersModel(UM.Qt.ListModel.ListModel):
                 position = int(position)
             except ValueError: #Not a proper int.
                 position = -1
-            default_colour = self.defaultColours[position] if position >= 0 and position < len(self.defaultColours) else defaultColours[0]
-            colour = material.getMetaDataEntry("color_code", default = default_colour) if material else default_colour
+            default_color = self.defaultColors[position] if position >= 0 and position < len(self.defaultColors) else defaultColors[0]
+            color = material.getMetaDataEntry("color_code", default = default_color) if material else default_color
             item = { #Construct an item with only the relevant information.
                 "id": extruder.getId(),
                 "name": extruder_name,
-                "colour": colour,
+                "color": color,
                 "index": position
             }
             self.appendItem(item)
diff --git a/plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml b/plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml
index aa4a749e92..6c506b9404 100644
--- a/plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml
+++ b/plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml
@@ -78,7 +78,7 @@ Item {
                             anchors.leftMargin: UM.Theme.getSize("default_lining").width
                             anchors.verticalCenter: parent.verticalCenter
 
-                            color: extruders_model.getItem(extruderSelector.currentIndex).colour
+                            color: extruders_model.getItem(extruderSelector.currentIndex).color
                             border.width: UM.Theme.getSize("default_lining").width
                             border.color: !enabled ? UM.Theme.getColor("setting_control_disabled_border") : UM.Theme.getColor("setting_control_border")
                         }
diff --git a/plugins/SolidView/SolidView.py b/plugins/SolidView/SolidView.py
index 8ff11a441a..6f63e332c9 100644
--- a/plugins/SolidView/SolidView.py
+++ b/plugins/SolidView/SolidView.py
@@ -63,7 +63,7 @@ class SolidView(View):
                         if extruder_id:
                             extruder_index = self._extruders_model.find("id", extruder_id)
                         if extruder_index:
-                            extruder_color = self._extruders_model.getItem(extruder_index)["colour"]
+                            extruder_color = self._extruders_model.getItem(extruder_index)["color"]
 
                             try:
                                 # Colors are passed as rgb hex strings (eg "#ffffff"), and the shader needs
diff --git a/resources/qml/Settings/SettingExtruder.qml b/resources/qml/Settings/SettingExtruder.qml
index 72c5299b15..5c21b1f269 100644
--- a/resources/qml/Settings/SettingExtruder.qml
+++ b/resources/qml/Settings/SettingExtruder.qml
@@ -64,7 +64,7 @@ SettingItem
                     anchors.leftMargin: UM.Theme.getSize("default_lining").width
                     anchors.verticalCenter: parent.verticalCenter
 
-                    color: extruders_model.getItem(control.currentIndex).colour
+                    color: extruders_model.getItem(control.currentIndex).color
                     border.width: UM.Theme.getSize("default_lining").width
                     border.color: !enabled ? UM.Theme.getColor("setting_control_disabled_border") : UM.Theme.getColor("setting_control_border")
                 }
diff --git a/resources/qml/SidebarHeader.qml b/resources/qml/SidebarHeader.qml
index 5d5e187a61..dd30e7d807 100644
--- a/resources/qml/SidebarHeader.qml
+++ b/resources/qml/SidebarHeader.qml
@@ -151,7 +151,7 @@ Column
                         anchors.leftMargin: (parent.height - height) / 2
                         anchors.verticalCenter: parent.verticalCenter
 
-                        color: model.colour
+                        color: model.color
                         border.width: UM.Theme.getSize("default_lining").width
                         border.color: UM.Theme.getColor("toggle_checked")
                     }
diff --git a/resources/qml/SidebarSimple.qml b/resources/qml/SidebarSimple.qml
index 6e6e28be3b..26d552610d 100644
--- a/resources/qml/SidebarSimple.qml
+++ b/resources/qml/SidebarSimple.qml
@@ -339,7 +339,7 @@ Item
         for(var extruderNr = 0; extruderNr < extruders.model.rowCount() ; extruderNr++) {
             extruderModel.append({
                 text: catalog.i18nc("@label", "Print using %1").arg(extruders.model.getItem(extruderNr).name),
-                color: extruders.model.getItem(extruderNr).colour
+                color: extruders.model.getItem(extruderNr).color
             })
         }
     }