On 3 March, The ‘Worm Moon’ Will Turn Blood Red
Because shorter waves of light, like blue and purple tones, scatter faster than their longer-length cousins, red and orange, the moon can look reddish or orange during the event.
Article source: https://www.huffingtonpost.co.uk/entry/march-blood-moon-explained_uk_69a1b721e4b03025399362bb