Open the PDF you downloaded from Color.mr in a drawing app that supports layers—Procreate, Clip Studio Paint, or even the free Ibis Paint all work. The reason is simple: layers let you keep the black line art separate from the color you lay down, so you can erase mistakes without touching the outlines. If your app doesn't have layers, skip ahead to the brush section; you can still color, but you'll need to be more careful.
Getting the PDF into your drawing app
First, you need to convert the PDF into a raster image (like PNG or JPG) because most drawing apps don't open PDFs directly. On an iPad, open the PDF in Files, tap the share icon, and choose “Open in Procreate” or your app of choice—it will import as a new canvas. On an Android tablet, download the PDF, then use the “Import” button in your app and select the file from your Downloads folder. If your app asks for a canvas size, pick the same dimensions as the PDF (usually around 8.5 x 11 inches) and set the DPI to 300 for crisp printing later. If the app gives you a transparent background option, choose it; you'll fill the white later.
Importing on iPad. The Files app handles the conversion. Tap the share icon and select your drawing app from the share sheet. The PDF opens as a new canvas with the correct dimensions already set.
Importing on Android. Download the PDF to your device, then open your drawing app and use the import function. Navigate to your Downloads folder and select the file. The app will ask about canvas size—match the PDF's dimensions and set DPI to 300.
Handling canvas size and DPI. If the app doesn't auto-detect, manually enter the PDF's dimensions. A DPI of 300 keeps lines sharp for printing. Choose a transparent background if available; you'll fill the white later.
Fill vs. brush: Which one to use when
For large areas like skies or backgrounds, the fill tool is your friend. Tap the bucket icon, make sure the line art layer is set to “Reference” (if your app has that) so the fill only spills inside the lines, and tap the area you want to color. If the fill bleeds out, lower the tolerance setting—start around 20% and adjust until it stays put. But for anything with fine detail, like hair strands or leaves, switch to a brush. A standard round brush with a smooth edge works best; skip textured brushes for line art, because they leave gaps. Use the fill for base colors, then switch to a brush to add shadows or highlights—that's where the real depth comes from. If you're new to shading, the guide on how to shade coloring pages for more depth walks you through the exact technique.
When to use the fill tool. The fill tool suits large, enclosed areas. Set the line art layer as reference to keep the fill inside the lines. Adjust tolerance if color bleeds.
When to use a brush. Fine details like hair or leaves need a brush. A standard round brush with a smooth edge works best. Textured brushes leave gaps in the line art.
Combining both for depth. Start with fill for base colors, then add shadows and highlights with a brush. This combination creates dimension. The shading guide explains the technique in detail.
Layers: Keep line art on top
Here's the most important habit: put the line art on the top layer and set its blend mode to “Multiply.” This makes the white background of the line art disappear, so you can color on layers underneath without covering the black lines. Create a new layer below the line art layer for your base colors. Then add another layer above the base color layer (but still below line art) for shading—set that layer to “Multiply” too, and pick a light blue or purple for shadows instead of black; it looks more natural. If you accidentally color outside the lines, use an eraser on the color layer only; the line art stays untouched. For a quick way to recolor the line art itself, duplicate the line art layer, lock its transparency, and paint over it with any color—this is great for matching the outline to your palette.
Setting up the layer stack. Place line art on top with Multiply blend mode. Create a base color layer below it. Add a shading layer above the base color but below line art, also set to Multiply.
Fixing mistakes without ruining line art. Use an eraser on the color layer only. The line art layer remains untouched. For recoloring line art, duplicate it, lock transparency, and paint over.
Recoloring line art easily. Duplicate the line art layer, lock its transparency, and paint over it. This lets you match the outline to your palette without affecting the original.
Exporting your finished page
When you're done, export the file as a PNG if you want to share it digitally—PNG keeps the transparent background and sharp lines. For printing, export as a PDF or a high-resolution JPG (300 DPI). In most apps, go to Share > Export, choose PNG or PDF, and save it to Files or your photo library. If you plan to print, don't export a compressed JPG at low quality; it will show pixelation. And if you want to keep your layers for future edits, save a copy in your app's native format (like .procreate) before exporting the flat image.
Choosing the right format. PNG for digital sharing, PDF or high-res JPG for printing. Save a native copy (like .procreate) to keep layers editable.
Saving for future edits. Always save a copy in your app's native format before exporting. This preserves layers for later adjustments.
Printing the colored version
Printing from a tablet works best if you export first, then print from the PDF or image viewer. Open the exported file, tap the share or print icon, and choose your printer. Set the paper size to match the original PDF (usually Letter or A4), and select “Fit to page” only if the margins are cut off—otherwise, leave it at 100% to avoid shrinking. If your printer has a “borderless” option, use it for full-bleed color; if not, expect a thin white margin. For a step-by-step walkthrough of the whole print process, including paper settings, the guide on how to open and print coloring page PDFs covers the details.
Setting up the print dialog. Open the exported file and use the share or print icon. Select your printer and set paper size to match the original PDF. Use “Fit to page” only if margins are cut off.
Handling margins and borderless options. Use borderless printing for full-bleed color. Otherwise, expect a thin white margin. The print guide explains paper settings in detail.
Choosing colors and backgrounds that work
Before you start coloring, spend a minute picking a palette. The how to choose colors that look good on coloring pages guide explains complementary colors and contrast, but a quick rule: pick one warm color (like orange or yellow) and one cool color (like blue or green) for the main elements, then use neutrals for the background. For backgrounds, avoid heavy patterns or dark colors that compete with the line art—use a light wash of color instead. If you're unsure, the how to color backgrounds on coloring pages without overpowering guide shows you how to keep the focus on the main subject.
Picking a palette. Choose one warm and one cool color for main elements. Use neutrals for backgrounds. The color guide explains complementary colors and contrast.
Backgrounds that don't compete. Avoid heavy patterns or dark colors. Use a light wash of color instead. The background guide shows how to keep focus on the main subject.
Turning coloring into a game
Once you're comfortable with the basics, you can use the same layers and brushes to play with the pages in new ways. For example, color the page in grayscale first, then set the color layer to “Overlay” to tint it—this gives instant shading without extra work. Or print a black-and-white page, color it on paper, then scan it back in and use the layers to add digital highlights. The games and activities with coloring pages beyond coloring guide has more ideas that work on a tablet, like turning a page into a memory game or a storyboard.
Grayscale to color overlay. Color the page in grayscale, then set the color layer to “Overlay” for instant shading. This technique adds depth without extra work.
Mixing paper and digital. Print a page, color it on paper, scan it back, and add digital highlights. This combines traditional and digital methods.
More game ideas. The games guide offers ideas like memory games or storyboards that work on a tablet.
Next step: Try a themed page
Now that you know the workflow, pick a page that matches your mood. The Fantasy Coloring Pages section has dragons and castles where the fill tool shines on big backgrounds, while the Seasonal & Holidays Coloring Pages are perfect for practicing fine brushwork on small details. If you're still deciding, browse the Themes Coloring Pages index to find something that fits your skill level. Load one up, import it, and start with a single layer for the base color—you'll have a finished digital page in less time than it takes to find your paper supplies. And if you ever get stuck on the import step, go back to the PDF and try a different app; some handle PDFs better than others, but the layer trick works the same everywhere. The last thing you need to remember: keep the line art on top, and you can't go wrong.