Cyan (RGB hex: #00FFFF) is one of three subtractive primary colors alongside magenta and yellow. It can be found on the color wheel in between green and blue. It is often confused for green or blue, and is essentially the color you get when add green and blue. Teal (RGB hex: #008080) is what one would call dark cyan. In languages like Chinese or Japanese, where green and blue are indistinguishable, the glyph for cyan is "青", while in Slavic languages or Italian, where blue is separated to light blue and dark blue, blue-leaning cyan is sometimes relegated to "light blue".

Very light shades of cyan are known as aquamarine. Greenish shades of cyan are known as teal or turquoise, while azure or cerulean are bluish shades of cyan.

Cyan is an invalid color and an incomplete tag. Use either teal, blue, or green in combination with the tag being described (e.g. teal_ears, blue_feet, green_background)