Hex #5bb5c2 or rgb(91,181,194) in RGB space is the tint of bluish cian. It has hue angle of 187.57 degrees, value = 76 and saturation = 53. #5bb5c2 can be obtained by mixing 4 colors: 1 drop of blue, 5 drops of cyan, 5 drops of white, 3 drops of black.
Nearest safe hex - #66cccc. Below you can see the block with #5bb5c2 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bb5c2 to the mixer and play with it.