1651384 - Mac dark mode, Thunderbird rendering nearly-white text on white

Status: RESOLVED DUPLICATE of bug 1639249

(Thunderbird :: Theme, defect)

Description

[Julian Field]

Attachment: Mac dark-versus-light bug.zip

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36

Steps to reproduce:

Set Mac appearance to Dark mode.
Start Thunderbird.
View HTML email message (attached).

Actual results:

When the Mac is in Dark mode, the message is rendered with nearly-white text on a white background.

Expected results:

The message should have been rendered in nearly-white on black, or else black on white, so the text is legible.
When the Mac is in Light mode, the message is rendered legibly with either Thunderbird's supplied "Default" or "Dark" themes. This is how it (correctly) renders on Windows.
All tested on 2020-07-07 nightly build.
Attached zip file contains the email message itself, so you can reproduce it, along with screenshots showing problem.

Comment 1

[Julian Field]

Attachment: Email message that renders illegibly

Comment 2

[Julian Field]

Attachment: Mac-Dark-with-Tbird-Dark-theme.png

Incorrect rendering when the Mac is in Dark mode.

Comment 3

[Julian Field]

Attachment: Mac-Dark-with-Tbird-Default-theme.png

Also incorrect rendering with Mac in Dark mode.

Comment 4

[Julian Field]

Attachment: Mac-Light-with-Tbird-Dark-theme.png

Message rendering correctly with Mac in Light mode.

Comment 5

[Julian Field]

Attachment: Mac-Light-with-Tbird-Default-theme.png

Also rendering correctly with Mac in Light mode.