diff --git a/src/group_gui.cpp b/src/group_gui.cpp
--- a/src/group_gui.cpp
+++ b/src/group_gui.cpp
@@ -89,31 +89,31 @@ static void ShowGroupActionDropdown(Wind
 
 
 static const Widget _group_widgets[] = {
-{   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,             STR_018B_CLOSE_WINDOW},
-{    WWT_CAPTION,  RESIZE_RIGHT,    14,    11,   447,     0,    13, 0x0,                  STR_018C_WINDOW_TITLE_DRAG_THIS},
-{  WWT_STICKYBOX,     RESIZE_LR,    14,   448,   459,     0,    13, 0x0,                  STR_STICKY_BUTTON},
-{      WWT_PANEL,   RESIZE_NONE,    14,     0,   200,    14,    25, 0x0,                  STR_NULL},
-{      WWT_PANEL,   RESIZE_NONE,    14,     0,   200,    26,    38, 0x0,                  STR_NULL},
-{      WWT_PANEL,   RESIZE_NONE,    14,     0,   200,    39,    51, 0x0,                  STR_NULL},
-{     WWT_MATRIX, RESIZE_BOTTOM,    14,     0,   188,    52,   168, 0x701,                STR_GROUPS_CLICK_ON_GROUP_FOR_TIP},
-{  WWT_SCROLLBAR, RESIZE_BOTTOM,    14,   189,   200,    52,   168, 0x0,                  STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHTXTBTN,   RESIZE_NONE,    14,   201,   281,    14,    25, STR_SORT_BY,          STR_SORT_ORDER_TIP},
-{   WWT_DROPDOWN,   RESIZE_NONE,    14,   282,   447,    14,    25, 0x0,                  STR_SORT_CRITERIA_TIP},
-{      WWT_PANEL,  RESIZE_RIGHT,    14,   448,   459,    14,    25, 0x0,                  STR_NULL},
-{     WWT_MATRIX,     RESIZE_RB,    14,   201,   447,    26,   181, 0x701,                STR_NULL},
-{ WWT_SCROLL2BAR,    RESIZE_LRB,    14,   448,   459,    26,   181, 0x0,                  STR_0190_SCROLL_BAR_SCROLLS_LIST},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,     0,    23,   169,   193, 0x0,                  STR_GROUP_CREATE_TIP},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,    24,    47,   169,   193, 0x0,                  STR_GROUP_DELETE_TIP},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,    48,    71,   169,   193, 0x0,                  STR_GROUP_RENAME_TIP},
-{      WWT_PANEL,     RESIZE_TB,    14,    72,   164,   169,   193, 0x0,                  STR_NULL},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,   165,   188,   169,   193, 0x0,                  STR_GROUP_REPLACE_PROTECTION_TIP},
-{      WWT_PANEL,     RESIZE_TB,    14,   189,   200,   169,   193, 0x0,                  STR_NULL},
-{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,   201,   306,   182,   193, 0x0,                  STR_AVAILABLE_ENGINES_TIP},
-{   WWT_DROPDOWN,     RESIZE_TB,    14,   307,   423,   182,   193, STR_MANAGE_LIST,      STR_MANAGE_LIST_TIP},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,   424,   435,   182,   193, SPR_FLAG_VEH_STOPPED, STR_MASS_STOP_LIST_TIP},
-{ WWT_PUSHIMGBTN,     RESIZE_TB,    14,   436,   447,   182,   193, SPR_FLAG_VEH_RUNNING, STR_MASS_START_LIST_TIP},
-{      WWT_PANEL,    RESIZE_RTB,    14,   448,   447,   182,   193, 0x0,                  STR_NULL},
-{  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   448,   459,   182,   193, 0x0,                  STR_RESIZE_BUTTON},
+{   WWT_CLOSEBOX,   RESIZE_NONE,  COLOUR_GREY,     0,    10,     0,    13, STR_00C5,             STR_018B_CLOSE_WINDOW},
+{    WWT_CAPTION,  RESIZE_RIGHT,  COLOUR_GREY,    11,   447,     0,    13, 0x0,                  STR_018C_WINDOW_TITLE_DRAG_THIS},
+{  WWT_STICKYBOX,     RESIZE_LR,  COLOUR_GREY,   448,   459,     0,    13, 0x0,                  STR_STICKY_BUTTON},
+{      WWT_PANEL,   RESIZE_NONE,  COLOUR_GREY,     0,   200,    14,    25, 0x0,                  STR_NULL},
+{      WWT_PANEL,   RESIZE_NONE,  COLOUR_GREY,     0,   200,    26,    38, 0x0,                  STR_NULL},
+{      WWT_PANEL,   RESIZE_NONE,  COLOUR_GREY,     0,   200,    39,    51, 0x0,                  STR_NULL},
+{     WWT_MATRIX, RESIZE_BOTTOM,  COLOUR_GREY,     0,   188,    52,   168, 0x701,                STR_GROUPS_CLICK_ON_GROUP_FOR_TIP},
+{  WWT_SCROLLBAR, RESIZE_BOTTOM,  COLOUR_GREY,   189,   200,    52,   168, 0x0,                  STR_0190_SCROLL_BAR_SCROLLS_LIST},
+{ WWT_PUSHTXTBTN,   RESIZE_NONE,  COLOUR_GREY,   201,   281,    14,    25, STR_SORT_BY,          STR_SORT_ORDER_TIP},
+{   WWT_DROPDOWN,   RESIZE_NONE,  COLOUR_GREY,   282,   447,    14,    25, 0x0,                  STR_SORT_CRITERIA_TIP},
+{      WWT_PANEL,  RESIZE_RIGHT,  COLOUR_GREY,   448,   459,    14,    25, 0x0,                  STR_NULL},
+{     WWT_MATRIX,     RESIZE_RB,  COLOUR_GREY,   201,   447,    26,   181, 0x701,                STR_NULL},
+{ WWT_SCROLL2BAR,    RESIZE_LRB,  COLOUR_GREY,   448,   459,    26,   181, 0x0,                  STR_0190_SCROLL_BAR_SCROLLS_LIST},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,     0,    23,   169,   193, 0x0,                  STR_GROUP_CREATE_TIP},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,    24,    47,   169,   193, 0x0,                  STR_GROUP_DELETE_TIP},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,    48,    71,   169,   193, 0x0,                  STR_GROUP_RENAME_TIP},
+{      WWT_PANEL,     RESIZE_TB,  COLOUR_GREY,    72,   164,   169,   193, 0x0,                  STR_NULL},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,   165,   188,   169,   193, 0x0,                  STR_GROUP_REPLACE_PROTECTION_TIP},
+{      WWT_PANEL,     RESIZE_TB,  COLOUR_GREY,   189,   200,   169,   193, 0x0,                  STR_NULL},
+{ WWT_PUSHTXTBTN,     RESIZE_TB,  COLOUR_GREY,   201,   306,   182,   193, 0x0,                  STR_AVAILABLE_ENGINES_TIP},
+{   WWT_DROPDOWN,     RESIZE_TB,  COLOUR_GREY,   307,   423,   182,   193, STR_MANAGE_LIST,      STR_MANAGE_LIST_TIP},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,   424,   435,   182,   193, SPR_FLAG_VEH_STOPPED, STR_MASS_STOP_LIST_TIP},
+{ WWT_PUSHIMGBTN,     RESIZE_TB,  COLOUR_GREY,   436,   447,   182,   193, SPR_FLAG_VEH_RUNNING, STR_MASS_START_LIST_TIP},
+{      WWT_PANEL,    RESIZE_RTB,  COLOUR_GREY,   448,   447,   182,   193, 0x0,                  STR_NULL},
+{  WWT_RESIZEBOX,   RESIZE_LRTB,  COLOUR_GREY,   448,   459,   182,   193, 0x0,                  STR_RESIZE_BUTTON},
 {   WIDGETS_END},
 };