PNG images can be up to 4096 × 4096 pixels.
Open a solid blue screen in fullscreen to check blue-channel response, locate pixel defects, compare panel uniformity, or download a blue PNG.
A blue test screen can reveal pixels that fail to reproduce the blue channel as well as visible bands or tinted areas. Compare it with the red and green screens for a more complete RGB check.
Choose a preset or custom color before opening the preview in fullscreen. Press Esc to leave fullscreen, then adjust the color and open it again.
For a better display check, view several colors in a dim room and keep the browser zoom at its normal level. The tool displays solid browser colors; it does not calibrate the monitor or repair pixels.