What is Registration color?

A built-in swatch that prints at 100% on every ink plate, so the marks used to line up the plates appear on all of them. It’s for printer’s marks only, which your design program adds when it exports a PDF with marks.

Why does Registration look black on screen?

Screens show it as the darkest color they can, which looks the same as the Black swatch. Only a separations preview shows the difference: Registration appears on every plate, real black on one.

Is Registration the same as rich black?

No. Rich black adds some cyan, magenta and yellow under black, such as C60 M40 Y40 K100 (240%), to make large areas deeper. Registration is every ink at 100%, 400% or more, and should never be used for artwork.

Won’t the printer just fix it?

Some will, after asking you. Many send the file back instead, because they can’t be sure what you meant. Fixing it in your file is quicker, or we do it for $10.

The printer said

“Text is set in Registration color”: Replacing Registration color with real black

Short answer

Registration is a special swatch that prints at 100% on every plate: cyan, magenta, yellow, black and any spot colors, so 400% ink or more. It exists for crop marks, which must appear on every plate, but it looks exactly like black on screen, so it ends up on text by accident. On press, small text made of every ink at once blurs and gets colored edges. Recolor it to 100% black (K) for text, or a proper rich black for large areas.

Updated November 8, 2026 · by Azaan Ali, print designer

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Why printers ask for this

Illustrator and InDesign both have a built-in [Registration] swatch, marked with a small crosshair and sitting next to Black in the Swatches panel. It looks the same as black on screen. Its job is printer’s marks: crop marks and registration targets have to print on every plate so the press operator can line the plates up. Anything you color with it gets the same treatment: 100% cyan, magenta, yellow and black, plus 100% of every spot color in the file.

On small text, that means four or more inks that each have to land in exactly the same place. They never quite do (that alignment is called registration), so letters print soft, with colored fringes, and fine details fill in. Adobe’s own help warns that type in Registration may not register properly and its black may look muddy. Large areas are worse: at 400% ink or more, far over the usual limit of around 300%, they dry slowly and can mark the sheet stacked on top.

Registration isn’t the same as rich black. Rich black is a recipe you choose, such as C60 M40 Y40 K100 (240% in total), to make large dark areas deeper. Registration is every ink at full strength, meant for marks only, and never right for artwork.

How to find and replace Registration color

Find it. In InDesign, open Window → Output → Separations Preview, set View to Separations and turn the plates on one at a time: anything that shows up on every single plate is in Registration. In Acrobat Pro, All tools → Use print production → Output Preview (Tools → Print Production in older versions) does the same for a PDF.
Illustrator: select one object or text frame that uses Registration, choose Select → Same → Fill Color to select every other one, then click the Black swatch (or a C0 M0 Y0 K100 swatch). Do the same with Select → Same → Stroke Color for outlines.
InDesign text: Edit → Find/Change, Text tab. Leave Find what empty, set Find Format to Character Color [Registration] and Change Format to Character Color [Black], then click Change All.
InDesign frames, lines and shapes: on the Object tab of Find/Change, find objects with a Fill or Stroke of [Registration] and change them to [Black].
Don’t try to delete the swatch: [Registration] is built in and can’t be removed. Recolor whatever uses it instead.
Use 100% K for text, thin lines, barcodes and small logos. Use a rich black such as C60 M40 Y40 K100 only for large black areas, or the recipe your printer gives you.
Check placed logos and PDFs too. They keep their own colors, so open the original, recolor it there and update the link.
Export again and check Separations Preview or Output Preview: your text should now appear on the black plate only, and only the crop marks on every plate.

Or send it to us

Find every object in Registration color, including inside placed logos and PDFs
Recolor text, lines and barcodes to 100% K, and large areas to your printer’s rich black
Bring total ink back under your printer’s limit
Leave the real crop and registration marks alone, so they still print on every plate

Fix my file · $10 Same day, fixed price, one round of changes included. Or ask a designer first.

Questions

What is Registration color?: A built-in swatch that prints at 100% on every ink plate, so the marks used to line up the plates appear on all of them. It’s for printer’s marks only, which your design program adds when it exports a PDF with marks.
Why does Registration look black on screen?: Screens show it as the darkest color they can, which looks the same as the Black swatch. Only a separations preview shows the difference: Registration appears on every plate, real black on one.
Is Registration the same as rich black?: No. Rich black adds some cyan, magenta and yellow under black, such as C60 M40 Y40 K100 (240%), to make large areas deeper. Registration is every ink at 100%, 400% or more, and should never be used for artwork.
Won’t the printer just fix it?: Some will, after asking you. Many send the file back instead, because they can’t be sure what you meant. Fixing it in your file is quicker, or we do it for $10.

Terms on this page: Registration, Rich black, Total ink coverage (TAC), Crop marks.

Sources: Adobe Illustrator: use swatches (the Registration swatch), Adobe InDesign: print objects on all color plates ([Registration]), Adobe InDesign: preview color separations and ink coverage.

Other things printers say

The printer said“Your black will print gray (or too much ink).”Plain black ink (C0 M0 Y0 K100) prints as a dark gray on large areas; adding some cyan, magenta and yellow under it makes a deep “rich black”, often C60 M40 Y40 K100.See the fix The printer said“Total ink coverage is too high.”Total ink coverage (TAC) is the four CMYK percentages added together at the darkest point of your file, and every press and paper has a maximum, often around 300% on coated paper and 260–280% on uncoated.See the fix The printer said“Some lines are too thin to print.”Lines thinner than about 0.25 pt (0.09 mm) can print broken, faint or not at all, so printers flag them as hairlines.See the fix

More on this kind of work: Print file fixing. Something else wrong with the file? See every printer message we fix.

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