For example , When golf ball 20 is White , the visual markings may be black , red , yelloW , orange or another color of relatively high contrast .
ings must be readily observable by the golfer relative to its background .
When golf ball 20 is White , the visual markings may be black , red , yelloW , orange or another color of relatively high contrast .
ings must be readily observable by the golfer relative to its background .