Glad it helped.
To manage theme for a workspace, you can open this table m2m_app_config_theme.LIST and filter with your workspace name in UX App Configuration column.
For example, see screenshot below, i filtered for SOW
If you can't find your workspace in that list then go to sys_ux_app_config table and open your record and check the themes tab to find and update your theme.
If you would like to go more deeper,
To manage themes for workspaces, you can either use UI Builder Experience settings or Theme Builder.
Below Docs Links will help you to understand them both.
Brand and theme settings for your workspace.
Configure theme for SOW in ITSM.
Accept the solution and mark as helpful if it does, to benefit future readers.
Regards,
Sumanth
