A facility operation display device having a display unit that is adapted to display information related to facility equipment to be operated, the facility operation display device comprising: a touch panel with which the facility equipment is operated; a converter that is adapted to convert a first palette value corresponding to the color information of respective pixels in an image constituting an operation screen displayed by the display unit into a second palette value corresponding to the color information of respective pixels in the image that is inverted or dimmed in response to a user operation with the touch panel is started; a display controller that is adapted to determine the color information on the basis of the second palette value, and to control the display unit so as to display the image composed of pixels with the determined color information, characterized in that the facility operation display device further comprises a specifier that is adapted to specify at least one of dimming processing and inversion processing of the operation screen displayed by the display unit on the basis of the operation of the user, wherein the converter is adapted to convert the first palette value corresponding to the color information of the respective pixels constituting an image representing the operation screen into the second palette value and to convert the first palette value corresponding to the color information of pixels in respective images of drawing objects disposed on the operation screen into the second palette value, when the specifier specifies dimming processing or inversion processing of the operation screen; the facility operation display device further comprises a manager that is adapted to manage the operation screen as an object, and additionally to manage the drawing objects disposed on the operation screen as lower objects belonging to a lower hierarchical level than the object for the operation screen; wherein the specifier is adapted to set a specific value specifying inversion processing or dimming processing in a property value possessed by the object for the operation screen managed by the manager, and the converter is adapted to convert the first palette value corresponding to the color information of the pixels in the respective images representing the drawing objects managed as the lower objects into the second palette value on the basis of a property value of an object belonging to a higher hierarchical level than the lower objects. a touch panel with which the facility equipment is operated; a converter that is adapted to convert a first palette value corresponding to the color information of respective pixels in an image constituting an operation screen displayed by the display unit into a second palette value corresponding to the color information of respective pixels in the image that is inverted or dimmed in response to a user operation with the touch panel is started; a display controller that is adapted to determine the color information on the basis of the second palette value, and to control the display unit so as to display the image composed of pixels with the determined color information, characterized in that the facility operation display device further comprises a specifier that is adapted to specify at least one of dimming processing and inversion processing of the operation screen displayed by the display unit on the basis of the operation of the user, wherein the converter is adapted to convert the first palette value corresponding to the color information of the respective pixels constituting an image representing the operation screen into the second palette value and to convert the first palette value corresponding to the color information of pixels in respective images of drawing objects disposed on the operation screen into the second palette value, when the specifier specifies dimming processing or inversion processing of the operation screen; the facility operation display device further comprises a manager that is adapted to manage the operation screen as an object, and additionally to manage the drawing objects disposed on the operation screen as lower objects belonging to a lower hierarchical level than the object for the operation screen; wherein the specifier is adapted to set a specific value specifying inversion processing or dimming processing in a property value possessed by the object for the operation screen managed by the manager, and the converter is adapted to convert the first palette value corresponding to the color information of the pixels in the respective images representing the drawing objects managed as the lower objects into the second palette value on the basis of a property value of an object belonging to a higher hierarchical level than the lower objects.