An electronic device comprising: a housing ; a cover window formed on a first surface of the housing; a display disposed under the cover window ; and an infrared sensor disposed under the cover window ; wherein the cover window comprises: a glass layer that is substantially transparent; an opaque layer comprising an opening, a location and a size of which correspond to at least a portion of the infrared sensor when viewed from the first 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 glass layer , the color layer and the opaque layer are sequentially stacked, wherein the infrared sensor is arranged to receive and/or emit light through the opening, the color layer and the glass layer ; wherein the cover window comprises an infrared sensor hole area which the infrared sensor faces, and a peripheral area; characterized in that the color layer is configured to transmit infrared light of a first wavelength band at a first ratio and transmit visible light of a second wavelength band at a second ratio not greater than the first ratio, wherein the first wavelength band is greater than the second wavelength band; the color layer includes a first layer disposed between the glass layer and the opaque layer and having a first refractive index, a second layer disposed between the first layer and the opaque layer and having a second refractive index that is smaller than the first refractive index, and a third layer disposed between the first layer and the second layer . a housing ; a cover window formed on a first surface of the housing; a display disposed under the cover window ; and an infrared sensor disposed under the cover window ; wherein the cover window comprises: a glass layer that is substantially transparent; an opaque layer comprising an opening, a location and a size of which correspond to at least a portion of the infrared sensor when viewed from the first 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 ; a glass layer that is substantially transparent; an opaque layer comprising an opening, a location and a size of which correspond to at least a portion of the infrared sensor when viewed from the first 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 glass layer , the color layer and the opaque layer are sequentially stacked, wherein the infrared sensor is arranged to receive and/or emit light through the opening, the color layer and the glass layer ; wherein the cover window comprises an infrared sensor hole area which the infrared sensor faces, and a peripheral area; characterized in that the color layer is configured to transmit infrared light of a first wavelength band at a first ratio and transmit visible light of a second wavelength band at a second ratio not greater than the first ratio, wherein the first wavelength band is greater than the second wavelength band; the color layer includes a first layer disposed between the glass layer and the opaque layer and having a first refractive index, a second layer disposed between the first layer and the opaque layer and having a second refractive index that is smaller than the first refractive index, and a third layer disposed between the first layer and the second layer . <EOS>