Green
Color of litmus will change.Red litmus will change into blue.
yellow
Litmus will turn blue in ammonia due to its alkaline/basic nature.
Ammonia is a base, and will turn red litmus blue.
red
water is a neutral sullusion it goes green.
Red, and an alikili goes blue.
Pure sodium carbonate is white.
As soap is alkaline in nature, it turns red litmus paper blue
Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under acidic conditions.
Blue litmus turns red in the presence of an acid. The opposite is correct in case of a base ie in presence of a base, red litmus turns blue in colour.
If the vinegar is strong enough to be below 4.5 pH the litmus paper will turn (or stay) red.