Developer Builds Single-File Color Picker After Growing Frustrated With Online Tools

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A developer created a lightweight, single-file color picker tool after repeatedly struggling to convert colors between HEX, RGB, and HSL formats while working on a design system. Existing online converters were deemed too slow, ad-heavy, and lacking context such as complementary color schemes. The tool was built using vanilla JavaScript with no external libraries, keeping it fast and offline-capable. Claude AI assisted with the initial code structure, but a subtle floating-point rounding bug in the color conversion logic required the developer to manually rewrite those functions. The project highlighted both the strengths and limitations of AI-assisted coding, particularly the need for human validation against real-world test cases.

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