diff --git a/src/newgrf_commons.h b/src/newgrf_commons.h
--- a/src/newgrf_commons.h
+++ b/src/newgrf_commons.h
@@ -101,19 +101,19 @@ TileIndex GetNearbyTile(byte parameter, 
 uint32 GetNearbyTileInformation(TileIndex tile);
 
 /**
- * Applies PALETTE_MODIFIER_TRANSPARENT and PALETTE_MODIFIER_COLOR to a palette entry of a sprite layout entry
+ * Applies PALETTE_MODIFIER_TRANSPARENT and PALETTE_MODIFIER_COLOUR to a palette entry of a sprite layout entry
  * @Note for ground sprites use #GroundSpritePaletteTransform
  * @Note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
  *       when to use the default palette.
  *
  * @param image The sprite to draw
  * @param pal The palette from the sprite layout
- * @param default_pal The default recolour sprite to use (typically company color resp. random industry/house color)
+ * @param default_pal The default recolour sprite to use (typically company colour resp. random industry/house colour)
  * @return The palette to use
  */
 static inline SpriteID SpriteLayoutPaletteTransform(SpriteID image, SpriteID pal, SpriteID default_pal)
 {
-	if (HasBit(image, PALETTE_MODIFIER_TRANSPARENT) || HasBit(image, PALETTE_MODIFIER_COLOR)) {
+	if (HasBit(image, PALETTE_MODIFIER_TRANSPARENT) || HasBit(image, PALETTE_MODIFIER_COLOUR)) {
 		return (pal != 0 ? pal : default_pal);
 	} else {
 		return PAL_NONE;
@@ -121,18 +121,18 @@ static inline SpriteID SpriteLayoutPalet
 }
 
 /**
- * Applies PALETTE_MODIFIER_COLOR to a palette entry of a ground sprite
+ * Applies PALETTE_MODIFIER_COLOUR to a palette entry of a ground sprite
  * @Note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
  *       when to use the default palette.
  *
  * @param image The sprite to draw
  * @param pal The palette from the sprite layout
- * @param default_pal The default recolour sprite to use (typically company color resp. random industry/house color)
+ * @param default_pal The default recolour sprite to use (typically company colour resp. random industry/house colour)
  * @return The palette to use
  */
 static inline SpriteID GroundSpritePaletteTransform(SpriteID image, SpriteID pal, SpriteID default_pal)
 {
-	if (HasBit(image, PALETTE_MODIFIER_COLOR)) {
+	if (HasBit(image, PALETTE_MODIFIER_COLOUR)) {
 		return (pal != 0 ? pal : default_pal);
 	} else {
 		return PAL_NONE;