To my understanding there are 6 Tri-color varieties:
Heavenly Blue, Pearly Gates, Blue Star, Flying Saucer,Wedding Bells and Summer Skies. Don't know of anything called I.Tricolor Lavender.You might check this link re: the Wedding Bells color.

http://www.geocities.com/billhenry.geo/wb.html

Here is a link that might be useful: Tri-color MG's

Hi mallowmallow.

The color lavender can refer to either a pinkish-purple or a bluish-purple and the Ipomoea tricolor cultivar "Wedding Bells" looks to me to be the pinkish-purple type of lavender...so describing the wedding bells as a lavender is not too 'far off' from my experience...

The various photos on the web sometimes can look just pink or more of a bluish-lavender,but the color seen in these pictures seem to be the result of lighting and camera settings as the "Wedding Bells" have always looked like a pinkish-lavender to me when viewed in person...

Check out the high quality photos in the fast loading PlantFiles database...

Hope my offerrings may be of some help...

TTY,...

Here is a link that might be useful: Wedding Bells photos in PlantFiles database