Extension displays wrong colors

[iLambda]

I have been surprised to notive that the color the extension displays seems wrong.
To give an example, I'm using the color code '#ff2200'.
This displays like this in VSCode :

However, when comparing it to the real color in paint.net, it seems to be wrong.

After having looked in settings, it doesn't seem this is a feature. I can't use this extension in the meantime, as I rely on colors appearing in my files to sort palettes. Is this indeed a bug, or have I missed something ?

EDIT: I don't know what happened in my screenshot, but it seems like compression flattened the colors a bit. On my screen with a calibrated color accurate output, it looks much, much worse (picture mellow orange vs hot orange).