I think it is supposed to be PURPLE. Because of the following:It turns red when placed in acidic solutionIt turns blue when placed in alkaline solutionAnd purple when placed in neutral.
Blue. This answer assumes that you are referring to litmus paper.
Lithmus will give a red color when added to acidified water or it will turn to red when neutral water is acidified.Remember:Litmus turnsBlue in BasicreD in aciD
Blue!! Because pool water is alkaline and alkalis turn red litmus paper into blue.
The water should stay the same colour if you are using litmus paper, but if you are using a liquid the colour should change. The colour purely depends on the acidity/alkalinity of the water you are putting it in. Yellows are alkaline, Greens are neutral and Blues are acidic (it may be the other way around.. yellow being acid, blue being alki.) The measure of acidity is pH.
In acid solution, blue colour of litmus is changed into red. In basic sol litmus change to blue.
Alkali turns litmus paper blue.
red
Hydrochloric acid is an acidic solution, so when litmus powder is added to it, the litmus powder would most likely turn red. This is because litmus paper turns red in acidic solutions and blue in basic solutions.
When red litmus is added to an alkali, its colour changes to blue. This is because an alkali is a base and has the property of turning red litmus paper or red litmus solution to blue.
it turns blue litmus paper red
will turn red litmus blue,