Hex #5b9e92 or rgb(91,158,146) in RGB space is the tint of greenish cian. It has hue angle of 169.25 degrees, value = 62 and saturation = 42. #5b9e92 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of cyan, 4 drops of white, 5 drops of black.
Nearest safe hex - #669999. Below you can see the block with #5b9e92 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b9e92 to the mixer and play with it.