Yes, but the ITV Generic 1989 idents were using the preceeding idents as the front caps. Tyne tees had a yellow background on their preceeding ident, other had a blue and others black... LWT white...
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SpiringUnhacked
Yorkshire had a blue fade to black - so blue was used on the generic one. I think this inspired the change to a full blue background when YTV dropped generic branding.