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Re: [csswg-drafts] [mediaqueries-5] image backgrounds vs transparency (#5671)

From: James Craig via GitHub <sysbot+gh@w3.org>
Date: Thu, 29 Oct 2020 22:46:05 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-719066552-1604011564-sysbot+gh@w3.org>
> derives from a MacOS setting 

All four major Apple platforms support this, not just macOS.

> in a context where transparency is often used but background images aren't a thing; 

Background images happen in native UI, but aren’t as common as on the Web. 

> is it also about reducing decorative visual complexity […] such that authors should not be using complex opaque backgrounds either?

I agree that this one is much more related to reduced visual complexity than the contrast issue in #5433. I would not go as far as to say authors should not be using any complex backgrounds, but they should not be using those complex backgrounds (opaque or otherwise) behind text and other content where the background visual can be distracting or reduce readability/understandability.

The main reason the native API includes transparency in the name is because 1) use of transparency is very common in modern UI starting with iOS 7 when this API shipped, and 2) users understand what the setting does and engineers understand what they should do to react to it.

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