About RGB Hex

Jimmy Raymond

B.S. Environmental Engineering & B.S. Computer Science · New Mexico Tech and the University of New Mexico

Hi — I’m Jimmy. I’m red-green color blind, so I’ve spent my whole life navigating interfaces that lean on color to mean something. Reds darken, certain greens and browns collapse into each other, and “just look for the red one” isn’t advice that works for me. RGB Hex is the toolkit I wanted: one that treats contrast, gamut, and color-vision deficiency as first-class concerns rather than afterthoughts.

My background is in engineering and software — a B.S. in Environmental Engineering and a B.S. in Computer Science, then years across safety-critical aircraft and space systems, real-time embedded software, and full-stack web development. That mix is why this site cares as much about being correct as about being pretty: the color math is written from primary sources and standards, isolated into pure functions, and unit-tested.

Why OKLCH-first

Most color tools still think in sRGB and HSL, where equal numeric steps don’t look equally different and gradients sink through muddy grays. OKLCH is perceptual: lightness means lightness, hue stays put when you change lightness, and palettes, gradients, and dark-mode inversions all behave. The tools here are authored in oklch(), and the color you pick even drives the site’s own accent — it dogfoods its own output.

How these tools are built and reviewed

• Grounded in primary sources. Every tool cites the standards and papers its math rests on — W3C CSS Color 4, WCAG 2.2, Björn Ottosson’s OKLab, Machado (2009) for color-vision simulation, CIEDE2000 for color difference. You’ll find them in the References block on each tool.
• Tested. The conversion, gamut, contrast, and harmony logic is pure and covered by automated tests that check it against known values.
• Independently reviewed. Changes go through a second-model code review before they ship, and each tool shows when it was last reviewed.
• Corrected in the open. If you find a mistake, tell me — reader corrections are the most valuable review this site gets.