You say tomato, I say orange?

Some of the latest crop of tomatoes. 

You'll notice there are red ones, yellow ones and orange ones. Wait a minute! Orange ones? Where did they come from? We have gone all season without seeing an orange one.

Husband says, 'Perhaps they're under-ripe red ones. But they were all on the same plant.'

I did a taste test. They don't taste like the red ones or the yellow ones, which are absolutely the best. (GrandSon4 agrees with me on that.)

So we've concluded they're late-fruiting orange ones. 'It would help if you were more organised and stuck labels on them when you plant them,' I suggest.
Husband says, 'There probably are labels but I can't be bothered to look for them.'

I suppose they could be genetically mutating themselves ...