diff --git a/src/aircraft_gui.cpp b/src/aircraft_gui.cpp
--- a/src/aircraft_gui.cpp
+++ b/src/aircraft_gui.cpp
@@ -72,7 +72,7 @@ void DrawAircraftImage(const Vehicle *v,
 		DrawSprite(rotor_sprite, PAL_NONE, x + 25, y + 5);
 	}
 	if (v->index == selection) {
-		DrawFrameRect(x - 1, y - 1, x + 58, y + 21, 0xF, FR_BORDERONLY);
+		DrawFrameRect(x - 1, y - 1, x + 58, y + 21, COLOUR_WHITE, FR_BORDERONLY);
 	}
 }
 
diff --git a/src/cheat_gui.cpp b/src/cheat_gui.cpp
--- a/src/cheat_gui.cpp
+++ b/src/cheat_gui.cpp
@@ -148,7 +148,7 @@ struct CheatWindow : Window {
 				case SLE_BOOL: {
 					bool on = (*(bool*)ce->variable);
 
-					DrawFrameRect(x + 20, y + 1, x + 30 + 9, y + 9, on ? 6 : 4, on ? FR_LOWERED : FR_NONE);
+					DrawFrameRect(x + 20, y + 1, x + 30 + 9, y + 9, on ? COLOUR_GREEN : COLOUR_RED, on ? FR_LOWERED : FR_NONE);
 					SetDParam(0, on ? STR_CONFIG_PATCHES_ON : STR_CONFIG_PATCHES_OFF);
 				} break;
 
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -1691,7 +1691,7 @@ struct NetworkJoinStatusWindow : Window 
 		}
 
 		/* Draw nice progress bar :) */
-		DrawFrameRect(20, 18, (int)((this->width - 20) * progress / 100), 28, 10, FR_NONE);
+		DrawFrameRect(20, 18, (int)((this->width - 20) * progress / 100), 28, COLOUR_MAUVE, FR_NONE);
 	}
 
 	virtual void OnClick(Point pt, int widget)
diff --git a/src/roadveh_gui.cpp b/src/roadveh_gui.cpp
--- a/src/roadveh_gui.cpp
+++ b/src/roadveh_gui.cpp
@@ -132,7 +132,7 @@ void DrawRoadVehImage(const Vehicle *v, 
 	}
 
 	if (highlight_w != 0) {
-		DrawFrameRect(x - 1, y - 1, x - 1 + highlight_w, y + 12, 15, FR_BORDERONLY);
+		DrawFrameRect(x - 1, y - 1, x - 1 + highlight_w, y + 12, COLOUR_WHITE, FR_BORDERONLY);
 	}
 }
 
diff --git a/src/settings_gui.cpp b/src/settings_gui.cpp
--- a/src/settings_gui.cpp
+++ b/src/settings_gui.cpp
@@ -1056,19 +1056,19 @@ struct CustomCurrencyWindow : Window {
 		y += 12;
 
 		/* separator */
-		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 2, 2) ? FR_LOWERED : FR_NONE);
+		DrawFrameRect(10, y + 1, 29, y + 9, COLOUR_DARK_BLUE, GB(this->click, 2, 2) ? FR_LOWERED : FR_NONE);
 		x = DrawString(35, y + 1, STR_CURRENCY_SEPARATOR, TC_FROMSTRING);
 		DoDrawString(this->separator, x + 4, y + 1, TC_ORANGE);
 		y += 12;
 
 		/* prefix */
-		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 4, 2) ? FR_LOWERED : FR_NONE);
+		DrawFrameRect(10, y + 1, 29, y + 9, COLOUR_DARK_BLUE, GB(this->click, 4, 2) ? FR_LOWERED : FR_NONE);
 		x = DrawString(35, y + 1, STR_CURRENCY_PREFIX, TC_FROMSTRING);
 		DoDrawString(_custom_currency.prefix, x + 4, y + 1, TC_ORANGE);
 		y += 12;
 
 		/* suffix */
-		DrawFrameRect(10, y + 1, 29, y + 9, 0, GB(this->click, 6, 2) ? FR_LOWERED : FR_NONE);
+		DrawFrameRect(10, y + 1, 29, y + 9, COLOUR_DARK_BLUE, GB(this->click, 6, 2) ? FR_LOWERED : FR_NONE);
 		x = DrawString(35, y + 1, STR_CURRENCY_SUFFIX, TC_FROMSTRING);
 		DoDrawString(_custom_currency.suffix, x + 4, y + 1, TC_ORANGE);
 		y += 12;
diff --git a/src/ship_gui.cpp b/src/ship_gui.cpp
--- a/src/ship_gui.cpp
+++ b/src/ship_gui.cpp
@@ -24,7 +24,7 @@ void DrawShipImage(const Vehicle *v, int
 	DrawSprite(v->GetImage(DIR_W), GetVehiclePalette(v), x + 32, y + 10);
 
 	if (v->index == selection) {
-		DrawFrameRect(x - 5, y - 1, x + 67, y + 21, 15, FR_BORDERONLY);
+		DrawFrameRect(x - 5, y - 1, x + 67, y + 21, COLOUR_WHITE, FR_BORDERONLY);
 	}
 }
 
diff --git a/src/train_gui.cpp b/src/train_gui.cpp
--- a/src/train_gui.cpp
+++ b/src/train_gui.cpp
@@ -109,7 +109,7 @@ void DrawTrainImage(const Vehicle *v, in
 	if (highlight_l != highlight_r) {
 		/* Draw the highlight. Now done after drawing all the engines, as
 		 * the next engine after the highlight could overlap it. */
-		DrawFrameRect(highlight_l, 0, highlight_r, 13, 15, FR_BORDERONLY);
+		DrawFrameRect(highlight_l, 0, highlight_r, 13, COLOUR_WHITE, FR_BORDERONLY);
 	}
 
 	_cur_dpi = old_dpi;
diff --git a/src/widget.cpp b/src/widget.cpp
--- a/src/widget.cpp
+++ b/src/widget.cpp
@@ -496,7 +496,7 @@ void Window::DrawWidgets() const
 
 
 	if (this->flags4 & WF_WHITE_BORDER_MASK) {
-		DrawFrameRect(0, 0, this->width - 1, this->height - 1, 0xF, FR_BORDERONLY);
+		DrawFrameRect(0, 0, this->width - 1, this->height - 1, COLOUR_WHITE, FR_BORDERONLY);
 	}
 
 }