Impatiens balsamina seeds?

I planted the old-fashioned I. balsamina 'Carombola' mix this year. Yes, they're easy to grow, yes the camellia-like blooms are pretty, but boy do these plants get big! The first seed pods are swelling, and I know they'll be ready to harvest pretty soon.

I've only seen "mixed" seed offered commercially or for trade, but I was thinking it would be nice to be able to offer the various colors separately.

Here's my question - will they grow true to parent if I take the trouble to keep the seeds separated out according to color?

Hi Go vols..I can't answer about the trueness of seed but I'll comment on the height:

I finally was able to plant Balsam Impatiens this year from seed (started early indoors). The plants have a flowering marathon going on now and they're as high as my Liatris spicatas! I don't remember them ever getting so big when I was a child..he he! I have purples, pinks, variegated colors..so I'm wondering the same thing about trueness.
Trish

Is this Himalayan Balsam? I have some. It's invasive in Britain and I should really dig it out but it's pretty and the bees love it!