Cobalt2-Slack
Option #1
Preferences
→Sidebar Theme
- Paste
#182E40,#1F4662,#1D425D,#FFFFFF,#988026,#FFFFFF,#988026,#FEBD29
Option #2
If you prefer having your "Activity Presence" colored green, you could try:
Preferences
→Themes
→Custom Theme
- Paste
#182E40,#1F4662,#1D425D,#FFFFFF,#988026,#FFFFFF,#2CDB00,#FEBD29