In reply to https://www.reddit.com/r/PowerShell/comments/7ap1tz/speeding_up_colorful_output_to_the_console/ , and using codes from https://gist.github.com/mlocati/fdabcaeb8071d5c75a2d51712db24011

ConColors.ps1

# PowerShell 5 and above
Enum MyConColor {
    Black
    Red
    Green
    Yellow
    Blue
    Magenta
    Cyan
    White
}

# Pre-PowerShell-5 uses C# for enums
#Add-Type -TypeDefinition @"
#    public enum MyConColor {
#        Black,
#        Red,
#        Green,
#        Yellow,
#        Blue,
#        Magenta,
#        Cyan,
#        White
#    }
#"@

# "Strong black" is gray
function Get-ConColors {
    param (
        [Parameter(Position=1,Mandatory=$true)]
        [String]$Text,
        [MyConColor]$ForegroundColor = [MyConColor]::White,
        [MyConColor]$BackgroundColor = [MyConColor]::Blue,
        [switch]$ForegroundStrong,
        [switch]$BackgroundStrong
    )

    $ConsoleTemplate = [char]27 + '[{0}m'

    $FG = 30 + [int]$ForegroundColor
    if ($ForegroundStrong) { $FG += 60 }

    $BG = 40 + [int]$BackgroundColor
    if ($BackgroundStrong) { $BG += 60 }

    Write-Output (
        $ConsoleTemplate -f $FG +
        $ConsoleTemplate -f $BG +
        $Text +
        $ConsoleTemplate -f 0
    )
}