Color Space Comparison Tool
Color Input
Module A: RGB vs CMYK Comparison
RGB (Screen)
RGB
CMYK (Print Simulation)
CMYK
Delta E: 0.00 (Color shift from RGB to CMYK)
Module B: Gamut Warning
This color is within the CMYK gamut and should print accurately.
Module C: Technical Conversions
| HEX | #000000 | |
| RGB | rgb(0, 0, 0) | |
| CMYK | cmyk(0%, 0%, 0%, 100%) | |
| HSL | hsl(0, 0%, 0%) | |
| LAB | lab(0, 0, 0) |
Module D: Contrast and Accessibility
Against White Background
Contrast Ratio: 21.00:1
AA
AAA
Against Black Background
Contrast Ratio: 1.00:1
AA
AAA
Color
Space
Tool
Enter any hex code or use the color picker to instantly compare how your color renders on screen versus in print. The RGB vs CMYK side-by-side preview shows you the visible color shift between digital and physical output, measured as a Delta E value so you know exactly how far your color drifts during the conversion.
Module B flags out-of-gamut colors that cannot be reproduced accurately using standard CMYK inks, giving you an early warning before you send files to a printer or upload to a print-on-demand platform like Printify or Printful.
Module C outputs the full technical conversion across five color spaces: HEX, RGB, CMYK, HSL, and LAB. Each value is copyable with one click, so you can paste directly into Adobe Illustrator, Photoshop, Canva, or your preferred design tool without manually recalculating anything.
Use this tool to check brand colors before printing, verify that your t-shirt design colors are print-safe, or convert between color models when working across different software environments.
What This Tool Does
The Ink and Pxl Color Space Comparison Tool converts any hex color value into five color models simultaneously: HEX, RGB, CMYK, HSL, and LAB. It renders a side-by-side visual preview showing how the same color appears on screen versus how it will simulate in CMYK print output, and it calculates the Delta E value between those two states so you can measure the perceptual color difference before you commit to printing.
This is not a generic color picker. It is a pre-press accuracy tool built for t-shirt designers, print-on-demand sellers, and anyone working across digital and physical production environments where color fidelity matters.
Why Color Shifts Between Screen and Print
Every screen displays color using the RGB model, which builds color from red, green, and blue light. Printers, including the direct-to-garment printers used by Printify, Printful, and other POD platforms, reproduce color using the CMYK model: cyan, magenta, yellow, and black ink layered onto a physical substrate.
These two systems do not share the same color gamut. RGB can produce a wider range of vivid colors, particularly in the blue, green, and neon ranges, than CMYK ink can physically replicate. When a color that exists in the RGB gamut has no equivalent in the CMYK gamut, the printer will substitute the closest printable value. That substitution is what causes the visible color shift that designers see when their screen-bright designs come back from the printer looking duller, darker, or noticeably different.
The degree of that shift is measurable. Delta E is the numerical distance between two colors in perceptual color space. A Delta E value below 2 is considered imperceptible to most human observers. A value above 5 indicates a shift that will be clearly visible in the printed output. This tool calculates Delta E from your RGB input to its CMYK simulation so you have a concrete number, not a guess, before your order goes to production.
Understanding the Out-of-Gamut Warning
Module B in this tool runs a gamut boundary check on your input color. If the color falls outside the printable CMYK gamut, the tool flags it with a warning. This means the exact color you designed with cannot be reproduced using standard four-color process printing.
Out-of-gamut colors are common when designers work in RGB-native environments like Canva, Figma, or Adobe Photoshop without first switching their document color profile to CMYK. Neon greens, electric blues, and highly saturated magentas are frequent offenders. Spotting an out-of-gamut color before upload saves you from a print run where the colors look nothing like your mockup.
If your color triggers the gamut warning, the practical fix is to adjust the hue, reduce saturation, or increase brightness until the color falls within gamut, then use the side-by-side preview to find the closest printable version that still works for your design intent.
The Five Color Values and When You Need Each One
HEX is the web standard. You use it in CSS, in Shopify theme customizations, and in design tools that accept hex input directly. It is the most common format for sharing brand color references across teams and platforms.
RGB is the native color model for screens. Use it when you are designing for digital mockups, social media assets, or any output that will be viewed on a display rather than printed.
CMYK is required for professional print file preparation. If you are submitting files to a commercial printer, a screen printing shop, or a specialty print vendor that accepts CMYK PDFs, your file must be in CMYK mode with the correct ink percentage values. Submitting an RGB file to a CMYK print workflow introduces a conversion step you cannot control, and the output will vary by printer.
HSL (Hue, Saturation, Lightness) is useful for design system work and CSS theming. It expresses color in human-readable terms that make it easier to build consistent color palettes, adjust tints and shades programmatically, or communicate color intent without relying on memorized hex codes.
LAB (also written as Lab* or CIELAB) is a device-independent color model used in color science, ICC profile workflows, and professional color management. It describes color the way human vision perceives it, not the way a device reproduces it. LAB values are used in Delta E calculations, which is why this tool outputs LAB alongside the other formats.
How to Use This Tool for Print-on-Demand Design
Start by entering the primary color from your design into the hex field, or use the color picker to sample it directly. Check the RGB vs CMYK preview to see how much the color shifts between screen and print simulation. Note the Delta E score. If it is below 2, your color will print close to what you see on screen. If it is above 5, consider adjusting your design color before uploading to your POD platform.
Use the gamut warning to confirm whether your color is printable at all in CMYK. If it is flagged, adjust your design color in your preferred tool until the warning clears, then copy the CMYK values from Module C and apply them directly in Adobe Illustrator or Photoshop to lock your document to the correct print-safe values.
For t-shirt design specifically, this workflow is particularly valuable for dark garments where ink transparency affects how CMYK colors appear on the fabric. A color that simulates accurately on a white background proof may still behave differently on a black or navy shirt, depending on the printing method. Use this tool as the first checkpoint in your color review process, not a substitute for a physical sample order on high-volume runs.
Who This Tool Is For
This tool is built for print-on-demand sellers who design their own products and want to reduce the gap between digital mockup and physical output. It is also useful for graphic designers working on merchandise for clients, brand managers verifying color consistency across digital and physical touchpoints, and Shopify store owners preparing artwork files for third-party fulfillment partners.
If you design t-shirts, stickers, mugs, or other printed products and you have ever been surprised by how different the physical item looks compared to your screen design, this tool gives you the diagnostic layer that is otherwise missing from most online print workflows.