Change PDF Page Color

Open your PDF, pick a color, choose which pages it applies to, and press Apply Color. The color is added as a background layer beneath the page content, so the text, images and layout stay exactly where they were.

No. The tool never edits an existing drawing instruction — it only adds one rectangle per page. In the default mode that rectangle is drawn before the page content, so it is physically impossible for it to alter a glyph, a font or a vector shape.

No. Pages are never converted to images. Text stays selectable and searchable, fonts stay embedded, vector art stays vector, and images keep their original compression — they are never re-encoded.

Yes. Choose the entire document, just the page you are looking at, or a custom range such as 1-3,6,8-12. Invalid or out-of-range entries are rejected with an explanation before anything is written.

Replace paints the color underneath the page, which is the safest option and works on any document with a clean background. Multiply paints on top and multiplies each pixel by your color, so white paper takes the color while black text stays black — this is the mode for tinting scanned pages.

Pick the Dark Mode accessibility preset, or choose a near-black color with Replace background. Note that a dark page only helps if the document text is light; on a normal black-on-white document you also need a reader that inverts the text.

Yes. Annotations, form fields, links, outlines, page labels, rotation, crop and bleed boxes, embedded fonts and document metadata are all carried through untouched. Only the page content stream gains one extra object.

Adding a color layer rewrites the file, which invalidates any existing digital signature. The tool detects signed documents and warns you before you download, so it is never a surprise.

No. This tool runs entirely in your browser using WebAssembly and JavaScript. Your PDF is read, previewed and rewritten on your own machine and never leaves it.

Yes, but choose the right mode. A scan is one full-page image, so a color placed behind it is hidden. The tool detects that and tells you to use Multiply or Darken, which tint the scan itself.

Yes. Set Images to “Keep images unchanged” and each image is cut out of the color layer using an even-odd clipping path, so the pixels underneath are never touched.

You can recolor PDFs up to 10MB and 100 pages. Larger documents are processed page by page with a progress bar you can cancel at any time.

Barely. Each recolored page gains a compressed content stream of roughly 150 bytes. A 200-page document grows by about 30KB, and the estimated output size is shown before you export.

Yes. Optimize for printing can lighten a heavy background to reduce ink coverage, write near-black as DeviceGray so a press uses black ink only instead of building rich black from four plates, and disable overprint on the color layer.

No. A reader’s dark mode, Acrobat’s “Replace Document Colors” and your operating system’s invert are display settings that live on your machine, not in the document. Nothing is saved into the file, so it cannot be shared or printed.

Because the colour was applied by a viewer setting rather than written into the document. Acrobat’s colour replacement sits in Preferences, not Document Properties — that is the tell. A colour baked in here becomes a real object in the page and travels with the file.

Yes. The colour is a filled rectangle inside the PDF, so it renders the same in Acrobat, Preview, Chrome, an e-reader or anyone else’s phone. That is the whole difference between this and a night-mode toggle.

No, and that surprises most people. A PDF page has no background field — the spec default is transparent, and what looks like white paper is usually just the absence of ink. Any background is an object drawn behind the content, which is exactly what this tool adds.

Almost always the “Background graphics” checkbox in the print dialog, which Chrome, Edge and Firefox all leave unchecked by default. Tick it and the colour prints. It is a browser setting, so it has to be enabled on each machine that prints the file.

Two usual causes: the printer is in grayscale or draft mode, or a dark background built from 100% black alone is printing as flat charcoal. For a press, convert dark pages to rich black; for an office printer, check the colour and quality settings first.

Usually yes. Screens display RGB while presses print CMYK, a smaller gamut, so vivid backgrounds shift toward muted. Convert your colour to CMYK and preview it before committing to a print run, or pick a softer tone that survives the conversion.

Keep two files: the recoloured one for reading and the original for printing. Alternatively leave “Background graphics” off when printing, which drops the colour without changing the document. There is no per-file switch that prints white and displays coloured.

WCAG 2.2 asks for at least 4.5:1 for normal text and 3:1 for large text (18pt, or 14pt bold) at level AA, rising to 7:1 at AAA. The live readout scores your chosen paper against the document’s body text and warns you when it falls short.

The evidence is genuinely mixed. Some studies report reading gains for people with high visual stress, while large trials and systematic reviews find no consistent benefit, and paediatric bodies do not endorse tints as a treatment. Many readers find a warm tint more comfortable, so we offer it as a preference rather than a remedy.

A warm off-white such as cream reduces glare while keeping dark text well above the contrast threshold, which suits most light-sensitive readers. Pure white maximises contrast for low vision. Very dark pages only work when the text is already light.

On an OLED or AMOLED screen, yes — black pixels are effectively switched off, and vendor measurements have shown large savings at high brightness. On an LCD the backlight stays on regardless, so the saving is negligible.

Yes. Enter any value in HEX, RGB or HSL, or use your browser’s eye dropper to sample one. There are also brand-colour presets and an opacity slider for a lighter wash of the same tone.

Not currently — the tool applies a solid colour, optionally at reduced opacity or through a blend mode. For a gradient or a picture behind your content you would need a full editor or the source document.

They can, but they reach the result by rasterising each page. That converts your text into pixels, so it stops being selectable and searchable, and the file typically grows substantially. This tool rewrites the page instead, leaving the text intact.