Set-ReadablePSReadlineColor.ps1

# set-psreadlineoption -EmphasisForegroundColor Blue -EmphasisBackgroundColor Black
if (Get-Module 'PSReadline' -ea 0) {
      Set-PSReadLineOption -ForeGround Yellow  -Token None      
      Set-PSReadLineOption -ForeGround Green   -Token Comment   
      Set-PSReadLineOption -ForeGround Green   -Token Keyword   
      Set-PSReadLineOption -ForeGround Cyan    -Token String    
      Set-PSReadLineOption -ForeGround Gray    -Token Operator  
      Set-PSReadLineOption -ForeGround Green   -Token Variable  
      Set-PSReadLineOption -ForeGround Yellow  -Token Command   
      Set-PSReadLineOption -ForeGround Gray    -Token Parameter 
      Set-PSReadLineOption -ForeGround Gray    -Token Type      
      Set-PSReadLineOption -ForeGround White   -Token Number    
      Set-PSReadLineOption -ForeGround White   -Token Member    

      $Host.PrivateData.ErrorBackgroundColor   = 'DarkRed'
      $Host.PrivateData.ErrorForegroundColor   = 'White'
      $Host.PrivateData.VerboseBackgroundColor = 'Black'
      $Host.PrivateData.VerboseForegroundColor = 'Yellow'
      $Host.PrivateData.WarningBackgroundColor = 'Black'
      $Host.PrivateData.WarningForegroundColor = 'White'

  set-psreadlinekeyhandler -chord 'Tab'            -Func TabCompleteNext      ### !!!!!
  set-psreadlinekeyhandler -chord 'Shift+Tab'      -Func TabCompletePrevious  ### !!!!!
  set-psreadlinekeyhandler -chord 'Shift+SpaceBar' -Func Complete             ### !!!!!

  Set-PSReadlineOption -token string    -fore white 
  Set-PSReadlineOption -token None      -fore yellow
  Set-PSReadlineOption -token Operator  -fore cyan
  Set-PSReadlineOption -token Comment   -fore green
  Set-PSReadlineOption -token Parameter -fore green
  Set-PSReadlineOption -token Comment   -fore Yellow -back DarkBlue

	Set-PSReadLineOption -ForeGround Yellow  -Token None      
	Set-PSReadLineOption -ForeGround Green   -Token Comment   
	
	Set-PSReadLineOption -ForeGround Green   -Token Keyword   
	Set-PSReadLineOption -ForeGround Cyan    -Token String    
	Set-PSReadLineOption -ForeGround White   -Token Operator  
	Set-PSReadLineOption -ForeGround Green   -Token Variable  
	Set-PSReadLineOption -ForeGround Yellow  -Token Command   
	Set-PSReadLineOption -ForeGround Cyan    -Token Parameter 
	Set-PSReadLineOption -ForeGround White   -Token Type      
	Set-PSReadLineOption -ForeGround White   -Token Number    
	Set-PSReadLineOption -ForeGround White   -Token Member    

}

If ($Host.PrivateData -and ($host.PrivateData.ErrorBackgroundColor -as [string])) {
  $Host.PrivateData.ErrorBackgroundColor   = 'DarkRed'
  $Host.PrivateData.ErrorForegroundColor   = 'White'
  $Host.PrivateData.VerboseBackgroundColor = 'Black'
  $Host.PrivateData.VerboseForegroundColor = 'Yellow'
  $Host.PrivateData.WarningBackgroundColor = 'Black'
  $Host.PrivateData.WarningForegroundColor = 'White'
}

<#
DefaultTokenForegroundColor            : Yellow
CommentForegroundColor                 : Green
KeywordForegroundColor                 : White
StringForegroundColor                  : White
OperatorForegroundColor                : Yellow
VariableForegroundColor                : Green
CommandForegroundColor                 : Yellow
ParameterForegroundColor               : Green
TypeForegroundColor                    : Green
NumberForegroundColor                  : White
MemberForegroundColor                  : White
DefaultTokenBackgroundColor            : DarkCyan
CommentBackgroundColor                 : DarkBlue
KeywordBackgroundColor                 : DarkCyan
StringBackgroundColor                  : DarkCyan
OperatorBackgroundColor                : DarkCyan
VariableBackgroundColor                : DarkCyan
CommandBackgroundColor                 : DarkCyan
ParameterBackgroundColor               : DarkCyan
TypeBackgroundColor                    : DarkCyan
NumberBackgroundColor                  : DarkCyan
MemberBackgroundColor                  : DarkCyan
EmphasisForegroundColor                : Cyan
EmphasisBackgroundColor                : DarkCyan
ErrorForegroundColor                   : Red
ErrorBackgroundColor                   : DarkCyan 
#>