What Does Blue Mean on Turnitin? (0% Similarity Explained + Color Chart)

1. The “blue icon” moment (and why it still makes people anxious)

There’s a hundred ways I’ve heard this exact moment explained: You open Canvas/Moodle/Blackboard, you click on your submission, and there it is , and a blue similarity icon (sometimes 0%, sometimes a low number). And then you’re confused:

● “Does blue mean I’m flagged?”

● “Why does Turnitin show different colors to my friend?”

● “Is blue ‘safe’ to submit… or does it mean Turnitin didn’t check anything?”

In this post I’ll answer that rapid , and then tell you what I’d look at next so you don’t misinterpret the result.

2. Quick answer: what blue usually means

In Turnitin’s classic Similarity Report views, blue usually means “no matching text” — commonly displayed as 0% similarity, those ranges come directly from Turnitin’s student guide for classic assignments.

But there’s an important caveat: Turnitin explicitly says the color scheme can vary by integration (LMS / product view), and that variation is expected.

So the most reliable thing to read is the percentage next to the color, then open the report details once.

If you want the full context behind similarity scores (and why citations and references can still show up), read my pillar guide: Turnitin Similarity Score Explained (2026).

3. The Turnitin similarity color chart (the one you’re looking for)

Here’s the common “classic assignments” color chart students see:

Those ranges come directly from Turnitin’s student guide for classic assignments.

4. Why some people see a different chart

In some Turnitin views (for example, Similarity/SimCheck), the low end is grouped differently: green may represent 0%, and blue may represent 1–24%.

That’s why you’ll see students arguing online like “blue is 0%” vs “blue is low similarity.” Both can be true, depending on the view.

5. If your blue isn’t 0%, here’s what’s happening

Turnitin spells this out: the color scheme may vary depending on the integration, and it doesn’t change the underlying match results.

Here’s how I’d “self-check” in 15 seconds:

1. Read the number, not the vibe. Is it 0%? 12%? 23%?

2. Look for your platform’s legend/help text (some universities publish their own chart for the LMS). For example, the University of Tennessee’s Canvas help page explicitly lists Blue = 0% in their setup.

3. If there’s no legend, assume you’re in one of the two common Turnitin groupings (classic vs SimCheck) and rely on the %.

For example, the University of Tennessee’s Canvas help page explicitly lists Blue = 0% in their setup.

6. Is blue “good”? Mostly yes , but it’s not a hall pass

If you’re calling your blue 0% / no matching text, that’s generally a low-risk signal. But it can still be deceptive if you get cocky.

Two real exceptions Turnitin itself recognizes:

● No similarity found might mean you’re not putting in source-based evidence (which a lot of assignments require). If you were supposed to cite research, a clean 0% might actually indicate a lack of sources rather than “perfect originality.”

● A document can have a 0% because of rounding, even if there are matches in the report (which can happen in longer documents).

So if you see blue/0%, I’d probably still do one quick check to see if: This assignment should have citations, quotes, or a reference list? If so, I’m going to open the report.

7. What I do next when I see blue (a 60-second checklist)

Even if it’s 0%, I don’t stop at the icon. I do this:

1. Open the Similarity Report once.

2. Check the Match Overview panel to confirm there are truly no meaningful matches (or to see whether it’s a rounding-to-0 situation).

3. If I used sources, I scan for the obvious academic basics:

● Are the in-text citations present where they should be?

● Is the reference list actually included (if required)?

4. If my class has a policy threshold, I follow the syllabus (policy beats color). Turnitin notes schools/instructors can set different expectations.

5. If anything still feels unclear, I ask one simple question:

“Do you evaluate body-text similarity separately from quotes/references?”

8. Blue vs green: what’s the practical difference?

Operationally, blue and green both live in “low similarity” neighborhood. The difference is not moral (“safe/guilty”). It’s operational:

● Blue/0%: no matching text OR matches that are so small they round down.

● Green/low %: there IS some matching text , often generic phrases, citations, templates or words that might overlap by chance , and you just want to check it’s safe.

If you are confused, the solution is the same: open the report, read Match Overview, and look to see where the overlap is living.

9. Conclusion

If there’s a lesson to be learned from seeing blue on Turnitin, it’s that’s…the bottom of the range of similarity (0% in the classic Turnitin view = nothing that turnsitin found is matching). If not 0%, you’re not “doing something wrong.” Turnitin itself points out that colors can be different with each integration, and might even use a different color scheme in certain views (green = 0% and blue = 01–24%). No matter what, the best bet is always the same: read the % and click through the Similarity Report once.

Here’s the bit that I wish I heard more students: blue doesn’t mean “you’re good.” Turnitin’s own student guide says there’s no one “reasonable” similarity score, and going to 0% can mean you haven’t actually included source-based evidence (which is what the assignment might be asking for). So if the assignment was asking you to use sources, treat the color as a heads up, not a pass: click Match Overview, see what Turnitin checked, and check that you’ve actually done your citations and references.

FAQ

What does blue mean on Turnitin?

Usually, it indicates no matching text (often shown as 0% similarity) in classic Turnitin views.

What does blue mean in Turnitin (in my LMS)?

It depends on the integration. Turnitin notes the color scheme may vary by platform, and some views swap the low-end grouping (green=0%, blue=1–24%).

What does a blue flag mean on Turnitin?

Students often say “flag,” but the color is not a misconduct label. It’s a similarity range indicator that helps you decide whether to review details.

Why is my blue not 0%?

You’re likely seeing a different integration’s grouping. Turnitin explicitly warns that color schemes can differ across integrations.

Is blue safe to submit?

Usually it’s low-risk, but I still open the report once—especially if the assignment requires sources. Turnitin notes that zero similarity may mean you haven’t included source-based evidence when you should have.

I don’t see any color/percentage — what does that mean?

Turnitin says two common reasons are: your instructor disabled student access, or the report is still generating (and resubmissions can take time to refresh).