Hex #78cbbe or rgb(120,203,190) in RGB space is the tint of greenish cian. It has hue angle of 170.60 degrees, value = 80 and saturation = 41. #78cbbe can be obtained by mixing 4 colors: 3 drops of yellow, 4 drops of blue, 5 drops of cyan, 5 drops of white.
Nearest safe hex - #66cccc. Below you can see the block with #78cbbe color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #78cbbe to the mixer and play with it.