Private/themes/Set-DarkTheme.ps1
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#Requires -Version 5.1 <# .SYNOPSIS Applies the dark theme to the EvergreenUI window resource dictionary. .DESCRIPTION Updates all DynamicResource brush entries on the window's resource dictionary to the Evergreen-branded dark palette. Must be called on the UI thread. .PARAMETER Window The WPF Window object to retheme. .PARAMETER ThemeLabelTextBlock The TextBlock in the title bar / settings view that displays the current theme name. Its text is updated to 'Dark theme'. .EXAMPLE Set-DarkTheme -Window $window -ThemeLabelTextBlock $themeLabelTextBlock #> function Set-DarkTheme { [CmdletBinding()] param( [Parameter(Mandatory)] [System.Windows.Window]$Window, [Parameter()] [AllowNull()] [System.Windows.Controls.TextBlock]$ThemeLabelTextBlock ) function NewBrush([byte]$r, [byte]$g, [byte]$b) { [System.Windows.Media.SolidColorBrush]::new( [System.Windows.Media.Color]::FromRgb($r, $g, $b) ) } $res = $Window.Resources # Evergreen brand dark palette - deep forest teal base $res['WindowBackgroundBrush'] = NewBrush 20 29 28 # #141D1C $res['TextPrimaryBrush'] = NewBrush 232 242 240 # #E8F2F0 $res['TextSecondaryBrush'] = NewBrush 144 170 167 # #90AAA7 $res['AccentBrush'] = NewBrush 77 184 173 # #4DB8AD $res['AccentHoverBrush'] = NewBrush 103 185 201 # #67B9C9 $res['AccentLightBrush'] = NewBrush 13 41 38 # #0D2926 $res['ControlBackgroundBrush'] = NewBrush 28 40 38 # #1C2826 $res['ControlBorderBrush'] = NewBrush 46 63 60 # #2E3F3C $res['ButtonForegroundBrush'] = NewBrush 0 0 0 # #000000 $res['ToggleThumbBrush'] = NewBrush 0 0 0 # #000000 $res['SecondaryButtonBackgroundBrush'] = NewBrush 45 68 64 # #2D4440 - visible above window bg $res['SecondaryButtonBorderBrush'] = NewBrush 90 123 119 # #5A7B77 - visible mid-tone border $Window.Background = $res['WindowBackgroundBrush'] if ($null -ne $ThemeLabelTextBlock) { $ThemeLabelTextBlock.Text = 'Dark theme' } # Colour the native OS title bar to match AccentBrush #4DB8AD (R=77 G=184 B=173) # COLORREF byte order is 0x00BBGGRR → 0x00ADB84D Set-DwmTitleBarColor -Window $Window -CaptionColorRef 0x00ADB84D -UseDarkMode $true } |