These keyboard images look more attractive than the one the colemak.com website. Perhaps you should suggest using something like that instead, to whoever has the power to update it!
I also note the "Easy to learn" section does not mention Tarmak at all. I think it would be nice to show images like those of the transitional keyboard layouts - it would make it an easier sell to potential converts.
Using Colemak-DH with Seniply.