I shoot sporting clays recreationally - nothing serious.
I always wear personal protective equipment.
This includes ear protection and safety glasses.
This is about safety glasses and contrast to the background.
I have three type of glasses: transparent, dark and yellow glasses.
Transparent glasses I have for average daylight conditions. (most frequently used)
Dark glasses for strong sunlight and midday shooting
Yellow glasses that (at least subjectively) improve light or visibility, or at least improve contrast in cloudy day, with less sunlight present against the greenish background
So, last time, it was rainy day. Clouds, intermittent rain, overcast sky. Not too much light.
I left my yellow glasses at home, and I had other two glasses in the range bag.
With transparent glasses I couldn't see the clay, because of green woods in the back in the background. (pine trees).
Contrast and background is extremely important in any target shooting, and choice of paper target is very important if anybody wants to make meaningful shooting.
For example:
ISSF pistol target is yellowish background for rings 1-6, and rings 7 - 10 are in black. Sight alignment is on lower end, 6 o clock, to be aligned between black and yellowish rings for best contrast. (And iron sights are made slant in forwardd to prevent any light reflection to the eye of shooter.
Sight are adjusted to hit center, when aiming at 6 oclock point between ring 6 and 7.
Background of such ISSF target is not white but yellowish, dark enough to reduce sunlight reflection to shooters eyes, and light enough to make good contrast against black rings.
Long range targets are light blue, being the best for contrast and clear picture at longer distances, tackling mirage effect as well., when for the shooter is necessary to see thin crosshairs of second focal plane scope, against distant target, shimmering on mirage
Smart riflemen, zeroing and recreational shooting:
Best to use light color background target, like white, yellow, light blue, or light grey, preferably with some squares or printed scale in inches or centimeters.
White-ish paper will give good contrast to see the bullet hole, and printed scale or printed squares will give good visible indication of poi error or accuracy from shooters position.
That being said, very often I have seen unexperienced shooter zeroing a rifle on black target similar to pistol target ISSF 25 meter R50. Shooting at black center, Then they usually dont see black hole, on black background, so after every one or two shoots need to walk to target 100 meters away to see where they hit.
So, yes. background is important.