Artistic license (also known as Artistic Licence in the UK, art licenselo, historical license, dramatic license, poetic license, narrative license, licentia poetica, or simply license) is a colloquial term, sometimes a euphemism, used to denote the distortion of fact, alteration of the conventions of grammar or language, or rewording of pre-existing text made by an artist in the name of art.
In summary, artistic license is:
Entirely at the artist’s discretion (color enhanced…)
Intended to be tolerated by the viewer (cf. “willing suspension of disbelief”)
Useful for filling in gaps, whether they be factual, compositional, historical or other gaps
Used consciously or unconsciously, intentionally or unintentionally or in tandem [WIKI]