Ceylon curry powder is a blend of spices commonly used in Sri Lankan cuisine, particularly in curry dishes. The exact composition of Ceylon curry powder can vary, but it typically includes a mixture of ground coriander, cumin, turmeric, fenugreek, cinnamon, cloves, cardamom, and sometimes mustard seeds, fennel seeds, and black pepper. 

The proportions of these spices can also vary depending on regional preferences and personal taste. Ceylon curry powder tends to have a complex flavor profile with a balance of aromatic, savory, and slightly spicy notes. 

It is often used to season meat, fish, vegetables, and legumes in Sri Lankan cooking, contributing to the rich and flavorful character of traditional dishes such as chicken curry, fish curry, and dhal curry.