Colour text, if possible.

    Args:
        text: Text to colourise
        colour: Colour to display text in
    Returns:
        Colourised text, if possible

def _colourise(text: str, colour: str) -> str:
    """Colour text, if possible.

    Args:
        text: Text to colourise
        colour: Colour to display text in
    Returns:
        Colourised text, if possible
    """
    if COLOUR:
        text = style(text, fg=colour, bold=True)
    return text