Those of you who have been using Kamagra for a while will know that Kamagra used to be manufactured in blue.

There were legal battles over the Intellectual Property rights for blue, diamond-shaped Sildenafil Citrate tablets.  As a result, Ajanta Pharma (who manufacture Kamagra) changed the colour of their blue pill to turquoise.

Kamagra is still available from some suppliers in both blue and turquoise but obvisously the turquoise tablets are newer.

There are no significant chemical differences between the blue and turquoise (or even pink) versions of Kamagra.  All colours and preparations of Kamagra work in the same way.