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PowerShell example using a hash table and null coalescing to map colour name to value
$colourName = 'green'
$colourMap = @{
red = 0xFF0000
green = 0x00FF00
blue = 0x0000FF
white = 0xFFFFFF
}
$colourValue = ($colourMap[$colourName], 0x0, 1 -ne $null)[0] # Null Coalescing
return $colourValue
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