Powershell to Create Custom theme for Modern SharePoint Pages
I used the theming designer to get me started with the theme color set. https://fabricweb.z5.web.core.windows.net/pr-deploy-site/refs/heads/7.0/theming-designer/index.html I then changed a few colors directly to more match the specific cooperate color codes. Easy as you please.   #Set Admin Center URL  $AdminCenterURL  = "https://XXXXXXXXXXXXXXXXXXXXX.sharepoint.com/"    #Connect to Admin Center  Connect-PnPOnline  -Url $AdminCenterURL  -Interactive   #Define the color palette  $ThemePalette  = @ {     "themePrimary"  = "#313842" ;      "themeLighterAlt"  = "#f5f6f7" ;      "themeLighter"  = "#d7dbe1" ;      "themeLight"  = "#b7bdc6" ;      "themeTertiary"  = "#e26653" ;      "themeSecondary"  = "#de543e" ;      "themeDarkAlt"  = "#2c333c" ;      "themeDark"  = "#252b32" ;      "themeDarker"  = "#1b1f25...