It's the natural salts present in the leather that show up as discoloured patches
Whitish patches can appear on the tongue, inside of the cheeks, or the palate.
Because of its atmosphere
Venus should appear to be a greenish-white (more on the white side).
the whitish glare of the stars appear milky
Because they are very far away.
The patches on the moon are the crators, the crators have shadows which make the craters darker. Which makes the moon appear patchy.
You will often have patches of skin that are red and appear to look like a rash. Sometimes the patches of skin will itch or form blisters around the patch.
No. Tornadoes do no glow at all. The sky before or during a tornado may appear greenish, though.
Canker sores appear as a whitish, round area with a red border. The sores are painful and sensitive to touch.
around the fifth day, a rash begins on the body. The rash is usually composed of flat pink patches or spots, although there may be some raised patches
Three toed sloths are grayish brown but they often appear greenish because of an algae that grows on their fur.
Gerry Spence