Add-ons
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Black Sand TH
This is a minimal skin with a nearly solid background and no visual distractions.
Cloudy Sky
A calm theme in different shades of blue for those with their heads in the clouds.
Raspberry Garden
Sweet and fruity theme in crimson and green, not only for summer.
Autumn Blush
A warm theme of a wood changing its colors, in red, orange and khaki.
Greeny Lemon
A refreshing theme with a delicate citrus flavor in yellow and green.
Retro Cyborg
A distinctive theme referring to retro arcade games in turquoise and blueviolet.
Irish Coffee
Elegant and mellow theme for true gentlemen in different shades of brown.
Pistachio Ocean
Light and fresh, calming theme in pistachio and bright blue colors - not only for medics.
Vioorange Warm
Warm, cozy, bright theme in violet and orange, ideal for winter or autumn.
MintGreen Dark Soft
This theme matches well with LinuxMint and Cinnamon Theme.
Use an add-on like Darko to darken the message body.
Originally written for Firefox.
Thanks to calvinchd at calch.themes.thunderbird.net for original Gruvbox Dark.
Tested up to v128.
Classic BB Colors
Calm and simple, bright theme in classic blue and beige colors.
Blurple
Blurple: A calming blend of blue and purple.
Start blurpmaxxing today.
Arc Theme for Thunderbird
Another Thunderbird theme inspired by the Arc theme.
To create your own collections, you must have a Mozilla Add-ons account.
