I am building a website for a client and they have asked that the gallery grid lightbox 'X' is darker and the left and right arrows are darker and are visible all the time (rather than only on hover). I have scoured the forum and can't seem to find a code that works for the site. The template is Foster.
The website is https://apricot-frog-pc6a.squarespace.com
An example of this can be viewed on any of the pages under 'work'.
Any help would be greatly received!