- Go to User Menu > Account Settings > Display > Theme
- Choose "Custom Theme"
- In the bottom of this section, look for a "Copy and paste to share theme colors:" box
- Copy and paste the values below
If the version of Mattermost is V3:
#191622,#E1E1E6,#44475a,#E1E1E6,#E1E1E6,#483C67,#78D1E1,#78D1E1,#67E480,#E89E64,#FF79C6,#191622,#191622,#E1E1E6,#E89E64,#191622,#78D1E1,#E89E64,#FF79C6,#191622,monokai
If the version of Mattermost is V4:
{
"sidebarBg":"#191622",
"sidebarText":"#E1E1E6",
"sidebarUnreadText":"#E1E1E6",
"sidebarTextHoverBg":"#483C67",
"sidebarTextActiveBorder":"#78D1E1",
"sidebarTextActiveColor":"#78D1E1",
"sidebarHeaderBg":"#41414D",
"sidebarHeaderTextColor":"#E1E1E6",
"onlineIndicator":"#67E480",
"awayIndicator":"#E89E64",
"dndIndicator":"#E96379",
"mentionBg":"#FF79C6",
"mentionBj":"#FF79C6",
"mentionColor":"#191622",
"centerChannelBg":"#191622",
"centerChannelColor":"#E1E1E6",
"newMessageSeparator":"#E89E64",
"linkColor":"#78D1E1",
"buttonBg":"#FF79C6",
"buttonColor":"#191622",
"errorTextColor":"#E96379",
"mentionHighlightBg":"#191622",
"mentionHighlightLink":"#E89E64",
"codeTheme":"monokai"
}