Add Opacity to forum themes

Quote from wild1145

Thanks for writing this up, I had meant to write a post to credit you and make people aware of this last night but at 2 AM I chose sleep instead. Thanks for the contribution and the forum looks really nice with relevant content on it now as a background instead of the stock image!

No problem, tho if possible i think it would be cool to turn the background white a little bit more see through, which can be done like so (this is for light mode because i use that)

(convert the hex value to rbg then add the alpha value like so, then you can change the last number to adjust the alpha/opacity value)

which looks like this

Quote from wild1145

So my only concern is around accessability and if some text is going to be harder to read than it needs to be.

I don't think it would be too much of an issue, you can always have text areas have no opacity or have different opacity levels like this: (levels are in red)

bump, would still love for this to be a thing, it would look pretty sweet