ColorWell is seated in my menubar.
When I open ColorWell the first time, it's working fine.
When I type a hex code the color in the background is colored according to the hex code.
After I finished the colouring work I close ColorWell.
The next time I open ColorWell, I can type the hex code, but the background color no longer changes and also the rest (Color name, RGB, HSL, HSB, Lab and CMYK) aren't updated anymore.
In fact a change in any field no longer updates the rest of ColorWell.
I have to quit ColorWell and start the application to make it work again.
Unfortunately the process repeats itself (start reading from the beginning of the text).
Selecting a color by using the color picker does work, but I often work with hex codes and less with the color picker.
Mac mini (late 2012) 16GG memory
macOS 10.14.3 Mojave