QR code generator with an OKLCH colour grid, SVG or PNG
Type a URL, pick a colour from a grid of sixteen hues and four greys, and download the code as SVG or PNG. It is built on beautiful-qr-code, a package of mine.
The palette is OKLCH, not HSL, which for a QR code is not a preference. In HSL a fixed lightness is a lie: yellow at 65% reads far brighter than blue at 65%, so a hue sweep gives swatches that scan and swatches that do not. OKLCH holds contrast right around the hue circle.