Hex #5bb9a4 or rgb(91,185,164) in RGB space is the tint of greenish cian. It has hue angle of 166.60 degrees, value = 73 and saturation = 51. #5bb9a4 can be obtained by mixing 4 colors: 4 drops of cyan, 2 drops of green, 5 drops of white, 3 drops of black.
Nearest safe hex - #66cc99. Below you can see the block with #5bb9a4 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bb9a4 to the mixer and play with it.