Hex #5b8d9e or rgb(91,141,158) in RGB space is the tint of bluish cian. It has hue angle of 195.22 degrees, value = 62 and saturation = 42. #5b8d9e can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of cyan, 4 drops of white, 5 drops of black.
Nearest safe hex - #669999. Below you can see the block with #5b8d9e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b8d9e to the mixer and play with it.