"Giving the knee"

[ccfc_is_my_life]

And if any of you are interested in the nature of the perception of colour and the linguistics used to express it (and I am probably boring you all to death, as usual) a Namibian tribe has an interesting take on such things:
https://www.gondwana-collection.com/...as-see-colour/

Can trump you for boring facts, once had to produce a range of screen colour setups to cover colour blindess. Did you know there are over 100 different types of colour blindness?