Use the [map->values] method. This method returns an array that contains the values of all the keys in the map. The values are ordered in the order they are stored in the map, not in the order they were added to the map.
var (colours = map( 'red'='#ff0000', 'green' = '#00ff00', 'blue' = '#0000ff', 'grey' = '#aaaaaa') ) $colours->values
staticarray(#0000ff, #00ff00, #aaaaaa, #ff0000)
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