Grayscale
Look for missing steps, crushed blacks or clipped whites in the neutral gradient.
Display color diagnostics
Color & Grayscale Test
Inspect pure colors, gradients, black levels and brightness directly in your browser.
Grayscale — inspect the display
Black levels
In a dark room, check whether near-black blocks remain visible without looking gray.
Color uniformity
Cycle red, green, blue and white to look for tinting, unevenness or stuck pixels.
Important: This is a visual reference test. Browser colors depend on your browser, operating system, HDR mode and display settings. It cannot replace a colorimeter.