Hex #5bbfdb or rgb(91,191,219) in RGB space is the tint of bluish cian. It has hue angle of 193.13 degrees, value = 86 and saturation = 58. #5bbfdb can be obtained by mixing 4 colors: 3 drops of blue, 5 drops of cyan, 5 drops of white, 1 drop of black.
Nearest safe hex - #66cccc. Below you can see the block with #5bbfdb color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bbfdb to the mixer and play with it.