An electronic device comprising: a housing; a cover window (210, 400) formed on a first surface of the housing; a display disposed under the cover window (210, 400); and an infrared sensor disposed under the cover window (210, 400); wherein the cover window (210, 400) comprises: a glass layer (410, 710) that is substantially transparent; an opaque layer (450, 770) 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 (430, 750) disposed between the opaque layer and the glass layer (410, 710) and forming at least a portion of a color exposed through the glass layer (410, 710); wherein the glass layer (410, 710), 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 (430, 750) and the glass layer (410, 710); wherein the cover window (210, 400) comprises an infrared sensor hole area which the infrared sensor faces, and a peripheral area; characterized in that the color layer (430, 750) 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 (430, 750) includes a first layer disposed between the glass layer (410, 710) and the opaque layer (450, 770) and having a first refractive index, a second layer disposed between the first layer and the opaque layer (450, 770) 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 (210, 400) formed on a first surface of the housing; a display disposed under the cover window (210, 400); and an infrared sensor disposed under the cover window (210, 400); wherein the cover window (210, 400) comprises: a glass layer (410, 710) that is substantially transparent; an opaque layer (450, 770) 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 (430, 750) disposed between the opaque layer and the glass layer (410, 710) and forming at least a portion of a color exposed through the glass layer (410, 710); a glass layer (410, 710) that is substantially transparent; an opaque layer (450, 770) 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 (430, 750) disposed between the opaque layer and the glass layer (410, 710) and forming at least a portion of a color exposed through the glass layer (410, 710); wherein the glass layer (410, 710), 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 (430, 750) and the glass layer (410, 710); wherein the cover window (210, 400) comprises an infrared sensor hole area which the infrared sensor faces, and a peripheral area; characterized in that the color layer (430, 750) 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 (430, 750) includes a first layer disposed between the glass layer (410, 710) and the opaque layer (450, 770) and having a first refractive index, a second layer disposed between the first layer and the opaque layer (450, 770) 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.