| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Since octopuses have copper-rich hemocyanin instead of hemoglobin flowing through them, their blood appears this color | blue | $400 | DJ | SCIENCE FACTS | 2025-12-11 | #9454 | |
| When dipped in a solution with pH above 8.3. litmus paper turns this color | blue | $1,600 | DJ | COLORFUL SCIENCE | 2021-01-05 | #8307 | |
| The primary colors are red, yellow & this | blue | $200 | J | SCIENCE BRIEFS | 2003-10-15 | #4393 | |
| Cyanosis, a condition where oxygen in the blood is low, turns the skin this color | blue | $500 | J | LIFE SCIENCE | 1992-03-10 | #1742 |