Dear David,
Thanks for your email. Jewellery is excetionally difficult to photograph and of course everyones computer screens are set up slightly differently.
We only use AAA tanzanite in these rings which is a bluey / purple colour. If you do order the ring and it is not as hoped for then you can return it for a full refund, provided it is betweeen a size J and Q.
If you require a deep blue colour then perhaps you should go for a saphirre. Let us know if you need more guidance.