CGC Label Colors Explained: What Every Color Means (2026)

Walk into any comic convention or scroll through a marketplace listing and you will see the same thing over and over: comics sealed in hard plastic cases with a colored label across the top. That case is a CGC slab, and the color of the label is not decoration. It is a code. Each color tells you, at a glance, what kind of grade the book received and how much you should trust the number printed next to it. Learn the colors and you can read a slab from across the room.

This guide breaks down every CGC label color — blue, yellow, green, purple, and the less common ones — what each one means, and, most importantly, how each affects the value of the book inside. If you are new to slabs entirely, start with our comic book grading explained primer, then come back here to decode the colors.

What CGC is and why the label color matters

CGC (Certified Guaranty Company) is the largest third-party comic grading service in the world. When you send a comic in, professional graders assign it a numeric grade on a 10-point scale, note any defects, and seal the book in a tamper-evident case with a certification label. That label carries the title, issue number, grade, and — crucially — a colored band that categorizes how the book was graded.

The color is a shorthand for the book’s story. A blue label and a purple label can show the exact same 9.4 grade, but they are not worth the same money, because one is telling you the book is unrestored and the other is telling you it has been repaired. Understanding that difference is the single most valuable thing a new collector can learn about slabs. For a wider look at how graders arrive at the number itself, see our comic book condition guide.

Blue label — Universal

The blue label, officially called Universal, is the one you will see most often and the one most collectors want. It means the book was graded on its own merits with no restoration and no qualifying defects. The grade on a blue label is the pure, unqualified condition grade — what you see is what you get.

Because it is the cleanest, most straightforward tier, the blue label is the benchmark against which the other colors are compared. When people quote market values for a slabbed book, they almost always mean the blue-label price. If you are buying a key issue as an investment, a blue label is generally what you are aiming for.

Yellow label — Signature Series

The yellow label is the Signature Series, and it is the exciting one. A yellow label means the book was signed by a creator (writer, artist, cover artist, or another relevant name) while a CGC representative witnessed the signing in person. Because the signature was authenticated at the moment it was applied, CGC certifies it as genuine — there is no question of a forged autograph.

This matters because an unwitnessed signature scrawled on a comic can actually lower a book’s grade — a raw autograph is treated as a defect, or worse, as a possible fake. A Signature Series slab turns that same signature into a documented, value-adding feature. A yellow-label book from a beloved creator can command a significant premium over an identical blue-label copy, especially for artists who have since passed away or rarely sign.

Green label — Qualified

The green label, or Qualified, is the one that confuses people most. A green label means the grader found a specific, significant defect that they chose to call out separately rather than let it drag down the overall grade. Common examples include a missing coupon or Marvel Value Stamp cut from an interior page, or a signature that could not be authenticated.

In practice, a Qualified grade says: “This book would grade at this number except for this one notable issue, which we are disclosing.” A Qualified 8.0 with a missing coupon is not the same as a Universal 8.0. Green-label books usually sell at a discount to blue-label copies of the same grade, because the buyer is accepting the disclosed flaw. They can still be a smart buy if you want a high-eye-appeal copy of an expensive key at a lower price.

Purple label — Restored

The purple label means Restored. Somewhere along the line, someone added non-original material to improve the book’s appearance or structural integrity — color touch, tear seals, piece replacement, trimming, or married pages. CGC detects this, notes the type and extent of restoration on the label, and assigns a restoration grade.

Restoration is the biggest value story of all the colors. A restored copy typically sells for a fraction of an unrestored blue-label copy in the same apparent condition — sometimes 40% to 70% less, depending on the book and how extensive the work is. That said, for extremely rare and expensive keys, a purple-label copy can be the only affordable way in. The label will grade the amount of restoration (slight, moderate, extensive) and the quality (A/B/C), which both feed into value. To understand what actually counts as restoration, read our dedicated guide to comic book restoration.

The other colors: Conserved, Signature + Restored, and more

Beyond the big four, CGC uses a handful of additional labels you will run into occasionally:

Conserved (also purple-toned family, labeled Conserved): Conservation is stabilization work that preserves a book without trying to disguise defects — for example, removing tape or reinforcing a spine using archival methods. CGC separates conservation from restoration because the intent is preservation, not cosmetic improvement, and it generally affects value less severely than full restoration.
Signature Series + Restored: a book that is both witnessed-signed and restored can carry a combined designation.
CGC label variants for special programs: CGC also issues distinctive custom and commemorative labels for certain grading tiers and events, but these are cosmetic label designs rather than new grading categories — the underlying color meaning still applies.

Label color quick-reference table

Here is the whole system at a glance. Use it to decode any slab you come across.

Label color	Name	What it means	Typical effect on value
Blue	Universal	No restoration, no qualifying defects	The benchmark / full market value
Yellow	Signature Series	Signed with a CGC witness present	Often a premium over blue
Green	Qualified	One significant disclosed defect	Usually a discount to blue
Purple	Restored	Non-original material added	Large discount vs. blue
Purple (Conserved)	Conserved	Archival stabilization only	Smaller discount than restored

How label color changes what a book is worth

The grade number gets all the attention, but among experienced collectors the label color is priced in first. Two copies of the same key issue, both showing 8.5, can differ in price by many multiples depending on whether the label is blue, green, or purple. When you research values, always compare like-for-like: a blue 8.5 against other blue 8.5 sales, not against a purple copy’s asking price.

The order of desirability, all else equal, generally runs: Signature Series (from a desirable signer) and Universal at the top, then Qualified, then Conserved, then Restored. But context matters — a yellow label is only worth a premium if the signature is one people care about, and a purple label on an ultra-rare Golden Age key may still be a five-figure book. For a structured way to look up real numbers, use a current comic book price guide and cross-check recent sold listings by label color.

Should you buy raw or slabbed?

Knowing the label colors is also useful when you are deciding whether to buy a book raw (ungraded) or slabbed. Slabbing adds cost and time, so it makes the most sense for high-value keys where authentication and a locked-in grade protect your money. For reading copies and lower-value books, raw is usually the smarter play. We break down the full trade-off in raw vs. slabbed comics.

If you are weighing CGC against the other grading companies — CBCS, PGX and others — each uses its own label system, and the differences matter for resale. Our comic grading services compared guide lays them out side by side so you can decide who to send your books to.

A few tips for reading slabs like a pro

Read the color before the number. Train yourself to clock the label color first — it frames everything else on the label.
Check the notes. Purple and green labels carry text describing the restoration or qualifying defect. Always read it; “slight color touch” and “extensive piece replacement” are very different animals.
Verify the certification. Every slab has a certification number you can look up on CGC’s site to confirm the book, grade, and label are real and match the case.
Compare within color. When judging price, only compare against sales with the same label color and grade.

Once you can read labels fluently, the whole graded market becomes far less intimidating — and you stop overpaying for green and purple books priced as if they were blue. If you are chasing high-end books, pair this with our roundup of the most valuable comic books, where label color makes an enormous difference to the final hammer price.

Frequently asked questions

Is a blue CGC label always better than a green or purple one?

For value, generally yes. A blue (Universal) label means no restoration and no qualifying defects, so it commands full market value. Green (Qualified) and purple (Restored) labels almost always sell at a discount to a blue copy of the same grade. The exception is Signature Series (yellow), which can carry a premium over blue when the signature is desirable.

Does a yellow Signature Series label always add value?

Not automatically. The premium depends entirely on who signed it. A witnessed signature from a legendary or deceased creator can add a lot; a signature from a lesser-known name may add little. What the yellow label guarantees is that the signature is authentic, which is valuable in itself.

What is the difference between Restored and Conserved?

Restoration adds non-original material to improve appearance or structure (color touch, piece replacement, trimming). Conservation is archival stabilization that preserves the book without cosmetic enhancement (such as tape removal or spine reinforcement). CGC labels them differently, and conserved books typically take a smaller value hit than restored ones.

Can I get a book re-graded or a label changed?

Yes. You can resubmit a slabbed book for a re-grade or a re-holder, and books are sometimes “cracked out” of restored slabs after professional work or re-evaluation. Any change is at the grader’s discretion, and pressing or cleaning services can affect the outcome. Understand the fees and timelines first — see our guide to comic book terminology for the vocabulary you will encounter along the way.

Ready to go deeper? Learn the number side of the equation in comic book grading explained, or browse the keys worth slabbing over in the Marvel and DC hubs.