(Just my $0.02 worth, (and kinda off topic) but actually a decent scart cable doesn't guarantee to fix this issue. PAL TVs see NTSC as black and white because the colour subcarrier in the NTSC signal is at a different frequency from that used by PAL (commonly 3.579545 MHz vs. 4.433618 MHz, although both come in many flavours.)
A single standard PAL TV can show NTSC as colour, provided she is fed a signal where the colour information is carried discretely. If you read "decent" as "RGB or fully wired", then what's been said does make sense, PROVIDED the tv set in question has an RGB capable scart. This way, the colour information will be derived from pins 15, 11, and 7 (R,G and B respectively)
If the tv does not have RGB capability, it will use the composite signal on pin 20, and the colour subcarrier will be missed, regardless of how good the scart lead.
So quit arguing it. Ok?)