Cover window and electronic device including same

An electronic device comprising:

• a housing including a first surface facing a first direction, a second surface facing a second direction that is opposite to the first direction, and a side surface surrounding at least a portion of a space between the first surface and the second surface;
• a touch screen display disposed within the housing and exposed through a first area of the first surface;
• an optical sensor included within the housing, disposed under a second area of the first surface that is adjacent to the first area, and the optical sensor is configured to receive and/or emit infrared light;
• and
• a processor electrically connected to the touch screen display and the optical sensor,
• wherein the first surface comprises:
• a glass layer that is substantially transparent;
• an opaque layer disposed between the glass layer and the second surface;
• and
• a color layer disposed between the opaque layer and the glass layer and forming at least a portion of a color exposed through the glass layer,
• wherein the opaque layer comprises an opening, a location and a size of which correspond to at least a portion of the optical sensor when viewed from the first surface, and
• wherein the optical sensor receives and/or emits infrared light through the opening, the color layer, and the glass layer.