diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -1414,7 +1414,7 @@ uint BaseSettingEntry::Draw(GameSettings
 
 	int x = rtl ? right : left;
 	if (cur_row >= first_row) {
-		int colour = _colour_gradient[COLOUR_ORANGE][4];
+		int colour = GetColourGradient(COLOUR_ORANGE, 4);
 		y += (cur_row - first_row) * SETTING_HEIGHT; // Compute correct y start position
 
 		/* Draw vertical for parent nesting levels */
@@ -2909,7 +2909,7 @@ void ShowGameSettings()
  */
 void DrawArrowButtons(int x, int y, Colours button_colour, byte state, bool clickable_left, bool clickable_right)
 {
-	int colour = _colour_gradient[button_colour][2];
+	int colour = GetColourGradient(button_colour, 2);
 	Dimension dim = NWidgetScrollbar::GetHorizontalDimension();
 
 	Rect lr = {x,                  y, x + (int)dim.width     - 1, y + (int)dim.height - 1};
@@ -2940,7 +2940,7 @@ void DrawArrowButtons(int x, int y, Colo
  */
 void DrawDropDownButton(int x, int y, Colours button_colour, bool state, bool clickable)
 {
-	int colour = _colour_gradient[button_colour][2];
+	int colour = GetColourGradient(button_colour, 2);
 
 	Rect r = {x, y, x + SETTING_BUTTON_WIDTH - 1, y + SETTING_BUTTON_HEIGHT - 1};