Hex #78acaf or rgb(120,172,175) in RGB space is the tint of cyan. It has hue angle of 183.27 degrees, value = 69 and saturation = 31. #78acaf can be obtained by mixing 4 colors: 4 drops of magenta, 5 drops of cyan, 4 drops of green, 4 drops of white.
Nearest safe hex - #669999. Below you can see the block with #78acaf color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78acaf to the mixer and play with it.