IANAL, but I noticed the licence files under data/ and to the best of my understanding neither particular colours nor colour schemes can be copyrighted (particular shades can be trademarked, but that's another matter). In the source repositories, the code surrounding the colours themselves may be covered by copyright, but not the colours themselves.
In some recently outdated EUIPO guidelines I see "A single colour may of course be an element of a design, but on its own it does not comply with the definition of a design because it does not constitute the ‘appearance of a product’.", in the newer guidelines the only mention of colour I see is under the grounds for refusal.
Given the Berne Convention and the TRIPS Agreement, it seems wholly reasonable to presume that US copyright guidelines on colour extend internationally.
As such, while it's polite to note the source of the colours in the relevant files, I think actually copying the licences is a bit excessive and would advocate for their removal.
IANAL, but I noticed the licence files under
data/and to the best of my understanding neither particular colours nor colour schemes can be copyrighted (particular shades can be trademarked, but that's another matter). In the source repositories, the code surrounding the colours themselves may be covered by copyright, but not the colours themselves.References:
As such, while it's polite to note the source of the colours in the relevant files, I think actually copying the licences is a bit excessive and would advocate for their removal.