Extending UIColor to Support Custom Styling
summary
Explains how UIColor extensions compute luminance from HSB/RGB components, implement the WCAG contrast formula, and automatically adjustColor brightness so a backend‑supplied or user‑picked color meets a min contrast ratio 7. Shows using UIColor.getHue(_:saturation:brightness:alpha:) and resolvedColor() to convert to CGColor, demonstrates examples (white vs black yields ~20:1, pink on black ~11:1, yellow on white 1:1), and outlines using iOS 13 dynamic colors and asset catalog color sets to handle dark mode.
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chapters (9)
- 0:00Introduction to color
- 1:31Understanding color spaces
- 4:40Deep dive into HSB
- 11:17Contrast and accessibility
- 13:00App themes and dark mode
- 14:43iOS 13 dynamic colors
- 19:25Custom color challenges
- 23:33Code solutions for contrast
- 29:02Conclusion
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