WCAG Contrast Checker Module

[AnaFerreira015]

Key Features:

1. WCAG Contrast Compliance:

• Automatically checks if color pairs meet AA and AAA contrast requirements.
• Distinguishes between small text (default) and large text (≥ 18pt or ≥ 14pt if bold).

2. Flexible Color & Font Input:

• Accepts colors in various formats: Hex (#FFFFFF), RGB tuples, or custom Color objects.
• Supports font sizes in px, pt, em, or rem, accounting for bold fonts.

3. Detailed Contrast Results:

• Outputs pass/fail results for both small text and large text at AA and AAA levels.
• Example result:

{
    "Element Type": {
        "Small Text": {"AA": "Pass", "AAA": "Fail"},
        "Large Text": {"AA": "Pass", "AAA": "Pass"}
    },
    "contrast_ratio": "15.3:1"
}

Test Coverage:

• Comprehensive unit tests check contrast compliance with WCAG standards for various color combinations and font sizes.
• Typography converters (e.g., px_to_pt, em_to_pt) are thoroughly tested to ensure accurate unit conversion.

WCAG Techniques:

• G18: Ensuring sufficient text contrast (AA and AAA compliance).
• G145: Meeting contrast requirements for large-scale text.