Please don't take offense at this, but..
WRONG WRONG WRONG WRONG WRONG WRONG. What you said is the EXACT opposite of 'correct'.. lol.
Heterozygous does NOT mean 'looks normal but carries a recessive trait'.
A diploid organism is heterzygous at a locus if it carries only one copy of a particular allele.. in this case, the fire is simply the heterozygous expression of the allele that causes black-eyed leucies in the homozygous expression of the trait.
So yes, patels are hets. Super pastels are homozygotes. Yellowbellies are heterozygotes. Ivories are homozygotes.