Validation Philosophy
HexRGBPro tools are deterministic: the same valid input must return the same output across sessions and browsers. We validate formulas against reference implementations, then run sample vectors that cover normal, boundary, and invalid inputs.
- Determinism: repeated identical input returns identical output.
- Traceability: each report includes input and output values.
- Safety: invalid input never crashes processing logic.
- Usability: outputs are copy-ready in common formats (HEX, RGB, HSL, CMYK).
Reference Test Vectors
We maintain reusable color vectors to ensure conversion stability after every change.
| Input HEX | Expected RGB | Expected HSL | Notes |
|---|---|---|---|
| #000000 | 0,0,0 | 0,0%,0% | Lower boundary |
| #FFFFFF | 255,255,255 | 0,0%,100% | Upper boundary |
| #FF0000 | 255,0,0 | 0,100%,50% | Primary red |
| #00FF00 | 0,255,0 | 120,100%,50% | Primary green |
| #0000FF | 0,0,255 | 240,100%,50% | Primary blue |
| #3B82F6 | 59,130,246 | 217,91%,60% | Default UI blue |
Tool-Specific QA Criteria
Main Converter
All conversion paths (HEX→RGB/HSL, RGB→HEX/HSL, HSL→RGB/HEX) are verified for round-trip consistency with expected rounding behavior.
Color Picker
Pointer and touch interactions are checked for stable coordinate mapping, with deterministic output for repeated selections on fixed hue/saturation/lightness values.
Image Palette Extraction
Sampling logic is validated against known test images to ensure color ordering stays stable under identical input and extraction count.
CMYK Conversion
CMYK percentages and total ink coverage are validated with known vectors and compared to independent reference calculators for sanity.
Name Matching
Nearest-color lookup checks distance ranking consistency and fallback handling for invalid HEX input formats.
Shades/Tints/Tones
Generated arrays are verified for monotonic lightness/saturation behavior depending on mode (shade/tint/tone).
Release Gate Before Publishing
- Formula gate: no mismatch on baseline test vectors.
- UX gate: no blocked actions on mobile and desktop.
- Accessibility gate: visible labels and keyboard reachability for core controls.
- Content gate: every tool page includes a practical usage section and references.
- Reliability gate: no broken local links and no JavaScript syntax errors.
Known Limitations
These browser tools are designed for web workflow accuracy, not ICC-managed prepress certification. For print-critical jobs, values should be revalidated in profile-managed desktop tools and with the print vendor.
Change Management
When formulas, output formats, or result rendering logic change, we retest the baseline vectors and re-run practical scenarios from case studies. If behavior changes intentionally, we document it in release notes and update this page.
External references: W3C CSS Color Module Level 4 and WCAG standards.