The 17-year-old, who is being mentored by Nicole Scherzinger on the ITV singing contest, has claimed: "People say I'm too dark to be a singer and there have been lots of references to how dark my skin is".
Opening up to Reveal magazine, former Greggs Bakery worker Hannah added: "The sad thing is that most of them are made by black people who just have lighter skin than me."
Hannah isn't the first 'X Factor' star to receive racist abuse - 2011 contestant Misha B also suffered with online bullying.
This led to British-born comedienne Gina Yashere, in an interview with The Voice website in 2011, to say that Misha was highly unlikely to reach the final.
“If there was any justice in the world she would win, but there isn’t. She’s not Leona Lewis, all light-skinned and pretty. She’s black and she’s big. She’s a combination of Missy Elliot, Nikki Minaj and Grace Jones - she’s too out there,” Gina said.
Croydon-born singer Hannah said she "doesn't go on Twitter now" and is taking no notice of the abuse.
This weekend she sung The Rolling Stones’ hit '(I Can’t Get No) Satisfaction' in the Great British Songbook-themed show but despite impressing judges with her laid-back performance, the bookies gave her odds of 5/4 to go.
However, Sam Callahan became the latest contestant to be voted off after a sing-off with Luke Friend on Sunday night's show.
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