When was this clue last seen?

This clue last appeared in the NYT Crossword on Sunday, 14 December 2025.

They turn red litmus paper blue

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litmuspaperthey

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This clue appeared in the NYT Crossword on Sunday, 14 December 2025. The answer BASES is a 5-letter entry.

This answer appears frequently in crosswords. View BASES answer history →

What is the answer to "They turn red litmus paper blue"?: BASES
How many letters is the answer to "They turn red litmus paper blue"?: The answer has 5 letters.
When was this clue last seen?: This clue last appeared in the NYT Crossword crossword on Sunday, 14 December 2025.
Has this crossword clue appeared before?: Yes. Variations of this clue have appeared 6 other times.

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