I used the Akito's recently for a bride that wanted ivory. The picture is in the flower gallery, and called "Leslie's wedding bouquet".
This rose was a big hit, and I will use it from now on for an ivory rose. Many people admired it's beauty. Even the mother-in-law was impressed...lol.
I have also used Vendella; one time they were perfect, big ivory heads, and the next time they were a peachy-pink color.
The type of lighting will also make a difference in perceived color.