Andrew Lloyd-Webber, with Jade Ewen, Says “Racism Prevalent in Eastern Europe” (Photo credit: Daniel Kruczynski)
The star, 64, spoke out after a string of disappointments in recent years for UK acts including Javine Hylton, Andy Abraham, Jade Ewen and boyband Blue.
The impresario co-wrote the song performed by Jade, who came fifth in 2009.
Asked what he thought about Britain's record, Lloyd Webber told the Radio Times: "I don't think there's any point beating around the bush. I'll put it to you by asking you a question. 'Did you see the Eurovision Song Contest this year? (when Engelbert Humperdinck narrowly avoided coming last).
"If you had seen it, you might have noticed one thing - I don't think there was one black face on the programme."
He said: "At the press conference in Moscow (in 2009), I was asked, 'Why have you brought a black artist?' I said, 'Because she is the most talented artist that we had and I think she's a major, major star.' I think we would have come second but there's a problem when you go further east..."
Asked whether he was saying that racism was the reason that Britain did not win, he said: "Well, it doesn't mean that we would necessarily have won that year but we could have come second.
"If you're talking about Western Europe - Germany, fine; France, fine; Spain, fine; Greece, fine; Scandinavian countries, fine. But Ukraine? Not so good."
A BBC spokesperson said: "The BBC is committed to Eurovision and has no evidence whatsoever of any racism around the event."
Swedish singer Loreen, 28, who is of Moroccan-Berber origin, won this year's Eurovision Song Contest. The former Swedish Idol contestant won with her club track Euphoria.