Need Better Contrast on Email Addresses that Received Mail

[pd]

Its a little difficult to determine which of my email addresses have new mail when using Thunderbird and Pop_OS (Modified Ubuntu).  Historically addresses with mail would show up as a bright blue, but now the addresses have a dark blue similar to the black font that makes up the addresses, and the contrast is insufficient.  A lighter and brighter blue announcing new email would be welcome. 

This doesn't seem to be a problem when using Thunderbird and Debian, but was noticed with the latest Pop_OS (Ubuntu) update.

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.