Hack the 3nh CR4501 colorimeter to show RAL colors on its own display

Colorimeter 3nh CR4501 RAL Hack

The 3nh CR4501 measures color accurately but won't tell you the RAL tone. This GitHub project patches the device firmware to display the closest RAL Classic match after every measurement, with name and match quality. The tool runs entirely in the browser via WebUSB, requires no uploads, and includes a backup/restore feature. It also unlocks disabled buttons. The patch touches only seven locations, leaving calibration untouched, and includes a measured color table of 216 RAL tones.