Why does my government PDF show a yellow question mark?

Indian government PDFs are digitally signed using certificates from NIC, eMudhra, or other CCA India licensed authorities. Adobe Acrobat and most PDF viewers don't include India's Root Certifying Authority (RCAI) in their default trusted certificate store. So even though the signature is completely valid and legally recognised under the Information Technology Act 2000, your PDF viewer shows a yellow question mark because it cannot automatically verify the issuer. Kagazo checks your PDF against the actual CCA India trust hierarchy and gives you a copy with a permanent green tick visible on any device.

Is my document safe? Do you store my PDF?

Your PDF is processed entirely in memory during verification. We never write your file to disk, never store it on our servers, and never share it with any third party. The file is deleted from memory immediately after verification is complete. You can also verify this by checking our open source backend code.

Which documents does Kagazo support?

Kagazo supports any PDF digitally signed under India's CCA certificate hierarchy. This includes e-Aadhaar, PAN card, DigiLocker documents, ITR-V, Form 16, and all state government certificates from Tamil Nadu e-District, AP and Telangana MeeSeva, Karnataka Nadakacheri and eJanma, Kerala Sevana portal, and more.

My Aadhaar PDF is password protected. Will it work?

Yes. Enter your Aadhaar password (first four letters of your name in capital letters followed by your birth year, for example RAMA1995) in the password field that appears after you upload your e-Aadhaar PDF. We decrypt it in memory, verify the signature, and return a verified copy.

What is the difference between "Signature Valid" and "Signature Unknown"?

Signature Valid means the document is genuinely issued by the government authority and has not been modified. Signature Unknown means your PDF viewer cannot verify the certificate chain — this is a viewer configuration issue, not a problem with your document. Signature Invalid means the document may have been tampered with or re-saved after signing.

Does this work on mobile?

Yes. Kagazo is fully mobile responsive and works on any Android or iOS browser. No app installation required. Simply open kagazo.in on your phone browser, upload your PDF and verify instantly.

Interactive Color Studio • 8 Format Converter & WCAG Checker

Color Picker & Palette Studio Free

Select colors, convert between HEX, RGB, HSL, HSV, and CMYK, test WCAG accessibility contrast ratios, and extract color palettes from uploaded images.

100% In-Browser RAM Privacy Image Eyedropper & Palette WCAG AA / AAA Score

Active Color

#E6570B

A: 1.00

Red (R)230

Green (G)87

Blue (B)11

Opacity / Alpha100%

Converted Color Formats (1-Click Copy)

HEX

#E6570B

HEXA

#E6570BFF

RGB

rgb(230, 87, 11)

RGBA

rgba(230, 87, 11, 1.00)

HSL

hsl(21, 91%, 47%)

HSLA

hsla(21, 91%, 47%, 1.00)

HSV

hsv(21, 95%, 90%)

CMYK

cmyk(0%, 62%, 95%, 10%)

CSS Declarations

color: #E6570B;

background-color: rgba(230, 87, 11, 1.00);

border-color: #E6570B;

WCAG 2.1 Accessibility Contrast Checker

Verify readability for web accessibility guidelines (ADA & Section 508 compliance).

Test Background:

Contrast Ratio

3.66 : 1

AA Normal (4.5:1)

✕ FAIL

AA Large (3.0:1)

✓ PASS

AAA Normal (7.0:1)

✕ FAIL

AAA Large (4.5:1)

✕ FAIL

Image Eyedropper & Palette Extractor

Upload any screenshot, photo, or brand logo to extract dominant colors and sample pixels.

Understanding Color Models in Web & Print Design

When to use HEX, RGB, HSL, or CMYK in your digital projects.

🌐 HEX & RGB (Screen Displays)

Used across CSS, HTML, and digital screens. RGB combines Red, Green, and Blue light from 0 to 255. HEX represents these values as a 6-digit hexadecimal string.

🎨 HSL (Human-Friendly Tuning)

Hue (0-360° on the color wheel), Saturation (0-100%), and Lightness (0-100%). Ideal for generating harmonious tints, shades, and dark-mode variations.

🖨️ CMYK (Commercial Printing)

Subtractive color model using Cyan, Magenta, Yellow, and Key (Black) inks for print brochures, posters, business cards, and physical merchandise.

👁️ WCAG Contrast (Accessibility)

A ratio comparing the relative luminance of foreground text to its background. Ensures readability across high ambient light and for low-vision readers.

Frequently Asked Questions

What color formats does the Kagazo Color Picker support?

Kagazo converts colors in real-time across 8 models: HEX (#RRGGBB), HEXA (with alpha channel), RGB, RGBA, HSL, HSLA, HSV / HSB, and print CMYK (Cyan, Magenta, Yellow, Key Black).

How do I extract a color palette from my own uploaded image or logo?

Scroll to the "Image Eyedropper & Palette Extractor" section and upload any image (JPG, PNG, WebP). The engine will automatically generate 8 dominant color swatches, and you can click anywhere on the image with the precision cursor to sample individual pixels.

What is the WCAG contrast ratio, and why is it important for web design?

The Web Content Accessibility Guidelines (WCAG 2.1) require a minimum contrast ratio of 4.5:1 for normal text (Level AA) and 7.0:1 for enhanced contrast (Level AAA) to ensure people with visual impairments can read content comfortably.