Is that more a personal gripe or should the hex/rgb values always be used?
I am always testing the accessibility of colour combinations
here...
https://webaim.org/resources/contrastchecker/Their tool works with hex values.
To test your page's accessibility required the use of an
eyedropper tool to convert your named colours to hex.
This can be impossible to do sometimes, if the element
has a hover state applied to it.
I have no objection to your use of named colours,
per se.
as it is obvious that your are more comfortable using them.
I understand that lightgreen has some sort of meaning when
compared to #9acd32.
If I wanted to have that comfort in my coding then I would
code it like this...
background-color: #696969; /* dimgrey */
color: #9acd32; /* yellowgreen */
coothead