1776660 - Implement high contrast icons variation

Status: NEW

(Thunderbird :: Theme, enhancement, P2)

Description

[Henry Wilkes (they/them) [:henry-x]]

The new supernova icons (bug 1768505) do not seem appropriate for high contrast mode (usually set in the operating system's accessibility settings).

1. They use two colors: stroke and fill (not including the background color provided by the element underneath the icon). Normally high contrast uses a single color.
2. They have thin strokes and small details.

I don't think we could just adjust the CSS stroke and fill of the current icons to get them to work for high contrast because they have been designed around the use of a fill and thin strokes. I think we need icons designed specifically for high contrast.

For 102 esr, we could temporarily use old icons for high contrast because they were more basic and had thicker strokes.

Comment 1

[Alessandro Castellani [:aleca]]

I think we need icons designed specifically for high contrast.

Yes, that's the plan for after 102.

For 102 esr, we could temporarily use old icons for high contrast because they were more basic and had thicker strokes.

We can't do that.
Many of the old icons were coming from m-c and we had to override them.
It creates unneeded complexity trying to keep both old and new icons and swap them on HG since the old icons use the wrong context-fill and that would mean a huge boilerplate CSS variation for every situation.

Comment 2

[Alessandro Castellani [:aleca]]

Making this an enhancement task since we're not gonna target 102.
We will handle this during the polish phase before 114.