Border colors and behaviour in WordPress.org

[beafialho]

A discussion came up on this issue regarding the header and when it should have a border vs when it shouldn't. The thinking would be, whenever the header background is the same color as the cover background, there should be a border to act as a visual mark.

The example for the header in the Hosting page:

Same for the footer.

Another example with the header and cover in black as well, there should be a white border with opacity between them.

Here's an example with coloured backgrounds:

There may be exceptions depending on the concept of the design (such as About) where separators don't have opacity, or thumbnails that could require a bit more opacity, but after a few tests I think 10% opacity for header and footer could work. What do you think @WordPress/meta-design @marko-srb?

[jasmussen]

The fewer exceptions the better, of course, we might even find we can do without them. But yes, sounds good.

[marko-srb]

I think having a 10% opacity there works well. Bea and I went over this issue for one additional page and it seems like a necessary element to me. Afterward, I tested various opacity lines on different pages and I think 10% works best, plus that we need that line. Hope this helps.