Hex #5bb7cf or rgb(91,183,207) in RGB space is the tint of bluish cian. It has hue angle of 192.41 degrees, value = 81 and saturation = 56. #5bb7cf can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of blue, 4 drops of cyan, 4 drops of white.
Nearest safe hex - #66cccc. Below you can see the block with #5bb7cf color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bb7cf to the mixer and play with it.