Hex #3687a6 or rgb(54,135,166) in RGB space is the tint of bluish cian. It has hue angle of 196.61 degrees, value = 65 and saturation = 67. #3687a6 can be obtained by mixing 4 colors: 5 drops of blue, 5 drops of cyan, 4 drops of white, 5 drops of black.
Nearest safe hex - #339999. Below you can see the block with #3687a6 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #3687a6 to the mixer and play with it.