Based on our record, Slack Themes seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Check out https://slackthemes.net/ for some ideas. You can the copy paste the values to your preferences in Slack to make use of theme. Source: about 3 years ago
Sweet Themes - Color Themes for Slack
Pivle - Daily graphic resources made with love
Best Of Themes - The simplest way to browse thousands of website themes
Sticker Mule Transfer Stickers - Apply complex designs + logos to any surface w/ vinyl decals
Branded Slack Themes - 1,000+ themes to customize your Slack
Mobbin - Latest mobile design patterns & elements library