Contrast & Black Level Test
Adjust your monitor to see the finest details in shadows and highlights.
Black Level Test
You should be able to distinguish each numbered square from the black background.
1
2
3
4
5
6
7
8
9
10
If squares 1-5 are invisible, your brightness is too low or your monitor has poor "black crush."
White Saturation Test
You should be able to see the squares against the white background.
255
250
245
240
235
230
225
220
215
210
If the squares are invisible, your contrast is too high, causing "clipping" in the highlights.
Understanding Dynamic Range
Contrast Ratio is the difference between the brightest white and the darkest black a monitor can produce. OLED screens have "infinite" contrast because they can turn pixels completely off.
Gamma affects how mid-tones are displayed. If your gamma is off, images might look "washed out" or overly dark even if your brightness is correct.
For the best results, view this page in a dimly lit room and disable any "Auto-Brightness" or "Blue Light Filter" settings on your device.