They are gorgeous.
The golden tabby/strawberry colouration is probably the result of a captive orange tiger inheriting a double recessive wideband gene. The hair shaft of a tiger isn't uniform in colour: there's a pale band between the follicle and the pigmented tip. The effect of the wideband gene is to lengthen the width of this pale mid band, which results in an apparent "de-pigmentation" or yellowing of the fur. (This also occurs in various other animals, such as rabbits and domestic cats.)
White tigers can inherit this trait too when they do, they end up being so pale that their stripes almost completely vanish!
It's worth noting though that the intentional breeding of colour morphs such as white tigers is condemned by conservationists and animal welfare activists (and many zoo associations), since such animals are highly inbred in order to display these recessive traits - almost all white tigers in captivity can trace their ancestry back to a single white male captured in India in the 1950s, and
white tigers generally have a much higher risk of physical deformities (as do golden tigers).