PowerShell example using an enumerator type to map colour name to value

Convert-ColourNameToColourValueEnumeratorType.ps1

$colourName = 'green'

# Only needs to be declared once
enum colour {
    red = 0xFF0000 
    green = 0x00FF00
    blue = 0x0000FF
    white = 0xFFFFFF
}

return ([colour] $colourName).value__