Private/themes/Set-LightTheme.ps1
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#Requires -Version 5.1 <# .SYNOPSIS Applies the light theme to the EvergreenUI window resource dictionary. .DESCRIPTION Updates all DynamicResource brush entries on the window's resource dictionary to the Evergreen-branded light 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 'Light theme'. .EXAMPLE Set-LightTheme -Window $window -ThemeLabelTextBlock $themeLabelTextBlock #> function Set-LightTheme { [CmdletBinding()] param( [Parameter(Mandatory)] [System.Windows.Window]$Window, [Parameter()] [AllowNull()] [System.Windows.Controls.TextBlock]$ThemeLabelTextBlock ) # Helper: create a SolidColorBrush from R,G,B components function NewBrush([byte]$r, [byte]$g, [byte]$b) { [System.Windows.Media.SolidColorBrush]::new( [System.Windows.Media.Color]::FromRgb($r, $g, $b) ) } $res = $Window.Resources # Evergreen brand light palette - primary: #009485, dark: #01786c, light: #67b9c9 $res['WindowBackgroundBrush'] = NewBrush 243 244 244 # #F3F4F4 $res['TextPrimaryBrush'] = NewBrush 26 26 26 # #1A1A1A $res['TextSecondaryBrush'] = NewBrush 77 90 88 # #4D5A58 $res['AccentBrush'] = NewBrush 0 148 133 # #009485 $res['AccentHoverBrush'] = NewBrush 1 120 108 # #01786c $res['AccentLightBrush'] = NewBrush 217 242 239 # #D9F2EF $res['ControlBackgroundBrush'] = NewBrush 255 255 255 # #FFFFFF $res['ControlBorderBrush'] = NewBrush 221 226 225 # #DDE2E1 $res['ButtonForegroundBrush'] = NewBrush 255 255 255 # #FFFFFF $res['ToggleThumbBrush'] = NewBrush 255 255 255 # #FFFFFF $res['SecondaryButtonBackgroundBrush'] = NewBrush 228 232 231 # #E4E8E7 - clearly above window bg $res['SecondaryButtonBorderBrush'] = NewBrush 154 173 170 # #9AADAA - visible mid-tone border $res['StatusPositiveBrush'] = NewBrush 37 110 73 # Softer green for light mode table highlights $res['StatusErrorBrush'] = NewBrush 166 64 64 # Softer red for light mode table highlights $Window.Background = $res['WindowBackgroundBrush'] if ($null -ne $ThemeLabelTextBlock) { $ThemeLabelTextBlock.Text = 'Light theme' } # Colour the native OS title bar to match AccentBrush #009485 (R=0 G=148 B=133) # COLORREF byte order is 0x00BBGGRR → 0x00859400 Set-DwmTitleBarColor -Window $Window -CaptionColorRef 0x00859400 -UseDarkMode $false } |