A cinnamon can be any body color. Cinnamons are colored very much like a normal budgie except where it would normally be black on the wings, it is cinnamon brown, and their body colors look somewhat washed out.

Cinnamon

• Mask (face) - depends on 'base' color
• Body - 'base' body color is muted to about 50% of a non-cinnamon. For example, cinnamon would turn a sky blue to a powder blue.
• Tail Feathers - whatever the'base' color is with a hint of cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple (except in the cinnamon grey green which will have grey to slate colored cheek patches)
• NOTE: - This is a sex-linked trait.
• NOTE: - Cinnamon babies are born with reddish colored eyes but this changes to the normal dark eye colors within about a week.
• NOTE: - Males often are a slightly deeper shade than females

Cinnamon Skyblue

• Mask (face) - white
• Body - skyblue body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - blueish color with a hint of cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Cobalt

• Mask (face) - white
• Body - cobalt blue body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - cobalt color with a hint of cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Mauve

• Mask (face) - white
• Body - purply-mauve body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - purply-mauve color with a hint of cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Grey

• Mask (face) - white
• Body - grey body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - grey to slate

Cinnamon Grey Green

• Mask (face) - white
• Body - grey green body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Violet

• Mask (face) - white
• Body - violet body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on white for wings and back
• Tail Feathers - pale cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Light Yellow

• Mask (face) - buttercup yellow
• Body - buttercup yellow body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on yellow for wings and back
• Tail Feathers - lighter than body color with a hint of cinnamon brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - pale purple
• Feet - pink

Cinnamon Light Green

• Mask (face) - yellow
• Body - grass green body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on yellow for wings and back
• Tail Feathers - dark blue with a hint of brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Dark Green

• Mask (face) - yellow
• Body - grass green body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on yellow for wings and back
• Tail Feathers - dark blue with a hint of brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Cinnamon Olive Green

• Mask (face) - yellow
• Body - olive green body color is muted to about 50% of a non-cinnamon. Cinnamon brown wavy on yellow for wings and back
• Tail Feathers - slightly darker blue with a hint of brown
• Throat Spots - three cinnamon brown spots on each side
• Cheek Patches - purple

Additional Resources:

• Budgie Bytes: Cinnamon - pictures and descriptions.