A door for a home appliance comprising: a panel assembly including a front panel defining at least a portion of a front appearance of the door, a rear panel disposed behind the front panel, and a spacer disposed between a peripheral portion of the front panel and a peripheral portion of the rear panel so as to maintain a spacing between the front panel and the rear panel, the front panel having a peripheral front panel portion; a frame assembly for supporting the panel assembly, the frame assembly including a side frame (300, 400) disposed along a side surface of the door, and a rear frame connected to the rear panel, wherein the side frame (300, 400) includes a rear frame connector (320, 420) connected to the rear frame and a panel connector (310, 410) connected to the front panel, and contacts outside air, a heat transfer structure (315, 415) for transferring heat of outside air from the side frame (300, 400) to an interior region defined between the front panel and the rear panel and between the spacer and a side end of the door, the heat transfer structure (315, 415) being formed to extend from the side frame (300, 400), and a thermal insulating space defined between the rear frame, the side frame (300, 400) and the interior region of the panel assembly, and provided therein with a thermal insulator, characterized in that the side frame includes an indented portion that is indented toward an inside of the door, the indented portion defining a handle of the door, the front panel is color-changeable and is made of a color glass panel, an opaque region is provided on an inner surface of the peripheral front panel portion of the front panel, and the door further comprises a heating element positioned on an inner surface of the opaque region to provide heat to the interior region. a panel assembly including a front panel defining at least a portion of a front appearance of the door, a rear panel disposed behind the front panel, and a spacer disposed between a peripheral portion of the front panel and a peripheral portion of the rear panel so as to maintain a spacing between the front panel and the rear panel, the front panel having a peripheral front panel portion; a frame assembly for supporting the panel assembly, the frame assembly including a side frame (300, 400) disposed along a side surface of the door, and a rear frame connected to the rear panel, wherein the side frame (300, 400) includes a rear frame connector (320, 420) connected to the rear frame and a panel connector (310, 410) connected to the front panel, and contacts outside air, a heat transfer structure (315, 415) for transferring heat of outside air from the side frame (300, 400) to an interior region defined between the front panel and the rear panel and between the spacer and a side end of the door, the heat transfer structure (315, 415) being formed to extend from the side frame (300, 400), and a thermal insulating space defined between the rear frame, the side frame (300, 400) and the interior region of the panel assembly, and provided therein with a thermal insulator, characterized in that the side frame includes an indented portion that is indented toward an inside of the door, the indented portion defining a handle of the door, the front panel is color-changeable and is made of a color glass panel, an opaque region is provided on an inner surface of the peripheral front panel portion of the front panel, and the door further comprises a heating element positioned on an inner surface of the opaque region to provide heat to the interior region.