How to use it
- Click the gray box above, or press F.
- The whole screen turns gray. Move the mouse or press an arrow key to see the controls hint.
- Click anywhere or press Esc to go back.
On an iPhone the browser keeps its address bar, so the color fills the page but not the very top strip. Turn the phone sideways or scroll a little to hide the bar.
What a gray screen is for
- Uniformity. On an even gray, darker or lighter patches, cloudy areas and color tints are easier to see than on white.
- Dirty screen effect. Big TVs sometimes show faint vertical bands or blotches when a flat color pans across. Try dark gray in a dark room.
- Neutral background. Gray does not tint nearby colors the way a bright color does, which helps when you compare colors or photos.
Questions
Is it gray or grey?
Both are right. Gray is the usual American spelling, grey the British one.
Which gray should I use to test a screen?
Start with mid gray for tint and uneven patches, then dark gray in a dark room for clouding and bands.
How do I exit?
Click anywhere, tap the screen, or press Esc.