PDF Editing Issues

How to Add a Blue Ink Signature in PDF Fill and Sign

Phi Hung Vo Oct 22, 2026 868 views

Question details

The user wants to know how to create and insert a blue handwritten signature when using the Fill and Sign tool for PDF documents.

How to Add a Blue Ink Signature in PDF Fill and Sign

Product: Adobe Fill and Sign
Device & OS: not provided
Scenario: Signing a formal PDF document where a blue ink signature is preferred or required to distinguish it from printed black text.
Observed behavior: The default typed and drawn signatures are currently only available in black ink, preventing the user from directly choosing a blue color option.

Before you start

Prepare a blank piece of white paper, a blue ink pen, and a smartphone or scanner to capture a clear digital image of your signature.

Solution 1Recommended

Import a Photographed or Scanned Blue Signature

Since the default drawn signatures only use black ink, you can bypass this limitation by photographing a physical blue signature and importing it as an image.

Currently, many standard Fill and Sign tools restrict typed and digitally drawn signatures to black ink. To add a blue signature, you must rely on the image import feature.

Write your signature

Use a dark blue ink pen to sign your name clearly on a piece of unlined, bright white paper.

Digitize the signature

Use your smartphone camera or a scanner to take a well-lit, close-up photo of the signature. Save it to your device as a JPG or PNG file.

Open Fill and Sign

Open your PDF document in your PDF reader and click on the 'Fill & Sign' tool from the right-hand pane or tools menu.

Import the image

Click the 'Sign' icon, select 'Add Signature', and choose the 'Image' option to browse and upload the blue signature photo you saved.

Apply and adjust

Click anywhere on the document to place the imported blue signature. Drag the corner handles to resize it so it fits perfectly on the signature line.

Import a Photographed or Scanned Blue Signature

Future Enhancements: Adding more native color choices for drawn and typed signatures is a frequently requested feature that may be added in future updates to standard PDF readers.

Easily Sign PDFs with WPS Office

Add Custom Blue Signatures Effortlessly in WPS PDF

WPS Office offers a robust PDF Editor that makes signing documents incredibly simple. You can easily import custom image signatures of any color or use advanced built-in tools to manage your signed documents effectively.

1. Open your PDF file: Launch WPS Office and open the PDF document that requires a signature.
2. Access the Signature tool: Navigate to the 'Insert' tab on the top ribbon and click on 'Sign', then select 'Create Signature'.
3. Upload your blue ink image: Click the 'Image' tab in the signature dialog box to upload the photo of your blue handwritten signature.
4. Place and save: Click on the designated signature field to drop the image, adjust its size, and save your document.

Seamlessly import and scale image signatures in blue or any other ink color.Fully compatible with standard Adobe Acrobat PDF formats.Lightweight application that processes heavy PDF files lightning-fast.Completely free built-in tools for filling forms, adding text, and inserting dates.

microsoft office alternative - wps office

Frequently Asked Questions

Why is my drawn signature only appearing in black?

By default, many basic Fill and Sign utilities restrict drawn and typed signatures to black ink to ensure high contrast and standardization on digital documents. You have to use the image import workaround for other colors.

How do I get rid of the grey background on my photographed signature?

Ensure you photograph your signature in bright, natural light. If a grey background persists, use a free online background remover tool or save the image as a transparent PNG before importing it into your PDF.

Is a blue ink digital signature legally binding?

Yes, in most regions, electronic signatures are legally binding regardless of the ink color used. Blue ink is traditionally preferred to help distinguish original documents from black-and-white photocopies.

PDF Troubleshooting