Embodiments of a device, system, method and other techniques are described for improved display calibration. An apparatus for display calibration may comprise, for example an optical waveguide comprising an entrance portion and an exit portion at different locations on a base portion of the apparatus, the optical waveguide to guide light output from a display of the apparatus arranged in a lid portion of the apparatus to a camera arranged in the lid portion of the apparatus and calibration logic at least a portion of which is in hardware, the calibration logic to measure one or more color attributes of the light output from the display and to calibrate one or more parameters of the display based on the measured color attributes. Other embodiments are described.