The Two Decisions That Make or Break How Your Packaging Looks on Press.
Every brand has a color they will defend to the death. The exact blue. The exact green. The one that has to look right on the shelf, every time, on every run. But here is what a lot of teams do not realize until proofs come back looking off: the file setup and the substrate choice you make before a job ever hits press can shift that color more than almost anything else in the process.
At Lauterbach Group, this is one of the most common conversations we have before a project goes to press. So let’s walk through what’s actually happening, and how to set your files up right from the start.
RGB vs. CMYK: Two Completely Different Color Worlds
RGB (Red, Green, Blue) is how screens create color. Your monitor, phone, and camera all build images by mixing light. It is a huge color space, which is why digital designs can look incredibly vivid.
CMYK (Cyan, Magenta, Yellow, Black) is how presses create color. Instead of light, we are laying down ink. CMYK has a smaller range than RGB, meaning some of those bright screen colors, especially certain blues, greens, and oranges, simply cannot be reproduced with process ink.
This is why we always recommend supplying files in CMYK rather than RGB. When a file is built and approved in RGB, then converted to CMYK later in the process, the color can shift once it moves into that smaller ink-based range. Blues can lean purple, brights can lose some punch, and the overall look can come across duller than what was approved on screen. Nobody touched the artwork. The color space simply works differently, and building in CMYK from the start is the best way to avoid that surprise.
What we recommend:
- Build and supply files in CMYK from the start whenever possible
- If a color is brand-critical, call it out as a Pantone spot color instead of relying on a CMYK build to get you there
- Ask for a physical proof, not just a screen preview, before a production run
Coated vs. Uncoated: The Substrate Changes the Color Too
Even a perfect CMYK file will not print the same on every stock. That comes down to coated vs. uncoated paper and film.
Coated stock has a smooth, sealed surface. Ink sits on top of it instead of soaking in, which means sharper detail, higher contrast, and colors that read closer to what is on screen. This is why coated stock is the standard choice when brand color accuracy and photo-quality graphics matter most.
Uncoated stock is more porous. Ink absorbs into the material instead of sitting on the surface, which softens detail and mutes color, sometimes significantly. Uncoated has its place. It can give packaging a premium, natural, tactile feel that fits certain brand positioning. But if nobody accounts for the color shift, the finished product can come back noticeably darker or flatter than the approved proof.
What we recommend:
- Decide on your substrate before final color approval, not after
- If you are choosing uncoated for the look and feel, ask your printer to proof on that exact stock so you are approving what you will actually get
- Do not assume a color that looked right on coated will look the same on uncoated, or the other way around
Why This Matters More in Labels and Packaging Than Almost Anywhere Else
A slightly-off color in a printed flyer is forgettable. A slightly-off color on a shelf, next to the same product a customer bought last month, is a problem. Packaging color consistency is brand trust. It is the difference between a customer grabbing your product without a second thought and a customer pausing because something looks off.
That is exactly why we push for the right conversation upfront: what color mode the file is in, what stock it is running on, and what a physical proof actually shows versus what a screen shows.
The Bottom Line
Getting color right on press is not about luck. It is about decisions made before the file ever reaches production:
- Build files in CMYK, and use Pantone for brand-critical color
- Choose your substrate early, and proof on the actual stock you are running
- Never approve final color from a screen alone
At Lauterbach Group, we walk clients through this every time a new project starts, so what you approve is what you get, run after run.
Have a color-critical project coming up? Let’s talk about it before it hits the press.
